Dermatology Clinic Of McAllen - Oasis Dermatology Group, PLLC

Dermatology Clinic Of McAllen - Oasis Dermatology Group, PLLC Experience comprehensive dermatologic care at Oasis Dermatology Group in McAllen, TX.

Our expert team offers medical, surgical, and cosmetic dermatology services for all ages.

Derm Index: Everything You Need to Know About Kawasaki’s DiseaseKawasaki Disease (KD) is a rare, acute, self-limiting sy...
02/13/2026

Derm Index: Everything You Need to Know About Kawasaki’s Disease

Kawasaki Disease (KD) is a rare, acute, self-limiting systemic vasculitis predominantly affecting infants and children. It is characterized by a febrile illness with associated mucocutaneous changes, including erythema of the mucous membranes, skin, and tongue, as well as swelling and desquamation of the hands and feet. Coronary artery involvement is the most significant complication of KD, which can lead to long-term cardiovascular issues. The etiology remains unknown, but it is hypothesized to involve genetic susceptibility and environmental triggers.

Epidemiology and Risk Factors

KD most commonly affects children under the age of 5, with a peak incidence at around 1 year of age and a mean age of 2.6 years. It is rare in children older than 8 years, and its incidence shows seasonal variation, peaking during the winter and spring months. KD is more common in boys than girls, and the condition is observed with a higher frequency in children of Asian descent, particularly in Japan. Although the exact cause is unknown, KD is believed to result from an interplay of genetic predisposition and an environmental trigger, potentially an infectious agent.

To Read More >>> https://oasisderm.com/kawasakis-disease-2/

Download the full PDF:https://oasisderm.com/wp-content/uploads/2025/01/Kawasakis-Disease.pdf

Image Source: dermnetnz.org

📢 Research Highlight & Case SummaryCongratulations to our providers on publishing an exceptionally rare case of cutaneou...
02/12/2026

📢 Research Highlight & Case Summary
Congratulations to our providers on publishing an exceptionally rare case of cutaneous perineurioma (a benign peripheral nerve sheath tumor) occurring in an unusual location on the medial superciliary arch. These tumors are very rare and can be challenging to diagnose because they mimic other spindle cell skin lesions.

✨ Proud of our providers’ research excellence and dedication to expanding understanding in dermatopathology!

Derm Index: What You Should Know About Erythema Ab IgneErythema ab igne (EAI) is a relatively uncommon skin condition ch...
02/11/2026

Derm Index: What You Should Know About Erythema Ab Igne

Erythema ab igne (EAI) is a relatively uncommon skin condition characterized by a reticulated or fishnet-like pattern of hyperpigmentation, resulting from chronic exposure to low levels of heat or infrared radiation. The term “ab igne” is derived from Latin, meaning “from fire,” reflecting the historical association of the condition with frequent exposure to heat sources. EAI is typically asymptomatic but may occasionally cause discomfort such as pain, burning, or itching. In the past, individuals working in environments with persistent heat exposure, such as bakers, metalworkers, and fireplace attendants, were at higher risk. However, with the advent of modern central heating systems, the condition has become less prevalent in developed countries. More recently, new sources of heat exposure, including space heaters, laptop computers, heating pads, and heated car seats, have been identified as emerging causes of EAI.

Pathophysiology and Etiology

Erythema ab igne results from chronic, low-level thermal injury to the skin, which damages the superficial vascular networks and the epidermis. The condition develops after repeated exposure to heat or infrared radiation that causes vascular dilation, leading to hyperpigmentation. Initially, the affected area presents as mottled or pinkish patches that progress to the characteristic reddish, violaceous, or brownish reticulated patterns. These changes are due to repeated thermal injury over time, which induces mild cellular atypia and increased elastic tissue deposition in the dermis, resembling the effects of chronic sun exposure. This vascular and dermal remodeling is a response to prolonged heat exposure, causing the vascular and elastic fibers to become more prominent, contributing to the appearance of the characteristic patterns of the condition.

To Read More >>> https://oasisderm.com/erythema-ab-igne-2/

Download the full PDF:https://oasisderm.com/wp-content/uploads/2024/12/Erythema-Ab-Igne.pdf

Image Source: dermnetnz.org

✨ Clear Skin, Clear Confidence. ✨Healthy skin can change how you feel every day. At Oasis Dermatology Group, our expert ...
02/09/2026

✨ Clear Skin, Clear Confidence. ✨

Healthy skin can change how you feel every day. At Oasis Dermatology Group, our expert team provides personalized care to help you achieve clearer, healthier skin you can feel confident in.

📅 Schedule your consultation today
📞 (956) 971-0404
🌐 www.oasisderm.com

Derm Index: All About Aphthous Ulcer (Canker Sore)Aphthous ulcers, also known as canker sores, are common, painful, supe...
02/07/2026

Derm Index: All About Aphthous Ulcer (Canker Sore)

Aphthous ulcers, also known as canker sores, are common, painful, superficial lesions of the oral mucosa. These lesions are most prevalent during childhood and early adulthood and are typically recurrent. Aphthous ulcers are a hallmark feature of recurrent aphthous stomatitis (RAS), a condition that affects up to 40-50% of the population in the United States. While aphthous ulcers are generally non-life-threatening, they can significantly impact quality of life due to their pain and recurrence.

Clinical Presentation

Aphthous ulcers are characterized by small, round or oval-shaped lesions with a yellow or grayish base surrounded by an erythematous (red) halo. These lesions are typically 2-8 mm in diameter, though they can be larger, and often occur on the non-keratinized mucosal surfaces of the oral cavity, such as the inner surfaces of the lips, inner cheeks, and floor of the mouth. Aphthous ulcers may appear singly or in clusters, and although they are painful, they usually heal spontaneously within 7 to 14 days without leaving a scar.

In recurrent aphthous stomatitis (RAS), the frequency of ulceration can vary widely, with some individuals experiencing frequent outbreaks, while others may have only occasional lesions. The lesions tend to cause significant discomfort, especially during eating, drinking, or speaking, and can sometimes be accompanied by mild systemic symptoms, such as fever or malaise.

To Read More >>> https://oasisderm.com/aphthous-ulcer-canker-sore-2/

Download the full PDF:https://oasisderm.com/wp-content/uploads/2025/02/Aphthous-Ulcer-Canker-sore.pdf

Image Source: dermnetnz.org

🌟 Patient Feedback Spotlight 🌟First visits matter, and we’re so happy to hear this! 💙 Thank you for sharing your experie...
02/04/2026

🌟 Patient Feedback Spotlight 🌟

First visits matter, and we’re so happy to hear this! 💙 Thank you for sharing your experience with Oasis Dermatology Group:

“The front desk ladies were so welcoming!! It was my first time at a dermatologist. I’m a new patient, and Miss Wood left me so happy about my diagnosis and she was able to answer all my questions! Everyone made my overall experience amazing! Thank you so much!”

We love helping new patients feel comfortable, informed, and cared for from the moment they walk through our doors.

Derm Index: All About Green Nail SyndromeGreen Nail Syndrome (GNS), also known as chloronychia, is a bacterial infection...
02/04/2026

Derm Index: All About Green Nail Syndrome

Green Nail Syndrome (GNS), also known as chloronychia, is a bacterial infection of the nails characterized by a distinctive greenish discoloration, which can range from blue-green to dark green or bluish-grey. This discoloration typically occurs beneath the nail plate and does not wash off, differentiating it from superficial staining. GNS predominantly affects one or two nails, either fingernails or toenails, and while the nails themselves are often not painful, the surrounding skin, including the cuticle area, may become swollen, red, and tender. The underlying cause of GNS is infection by Pseudomonas aeruginosa, a bacterium commonly found in moist environments, which produces pigments responsible for the green coloration.

Etiology and Pathophysiology

The causative agent of GNS, Pseudomonas aeruginosa, is a gram-negative, opportunistic pathogen that thrives in wet environments. It is widely distributed in nature, including in hot tubs, sinks, contact lens solution, and bath sponges. When P. aeruginosa infects the nail, it produces two primary pigments—pyocyanin and pyoverdin—which give the affected nails their characteristic greenish hue.

The infection is generally localized to the space beneath the nail, also known as the subungual space, and typically does not extend beyond the nail itself. This condition occurs when the nail plate is disrupted, creating a space between the nail and nail bed where P. aeruginosa can proliferate.

To Read More >>> https://oasisderm.com/green-nail-syndrome-2/

Download the full PDF:https://oasisderm.com/wp-content/uploads/2024/12/Green-Nail-Syndrome.pdf

Image Source: dermnetnz.org

☀️ Sun Safety Is Always in Style.Protecting your skin today helps preserve its health and beauty for years to come. At O...
02/02/2026

☀️ Sun Safety Is Always in Style.

Protecting your skin today helps preserve its health and beauty for years to come. At Oasis Dermatology Group, we’re here to guide you on proper sun protection and skin care—every season, every day.

🧴 Wear sunscreen
🕶️ Protect your skin
👩‍⚕️ Trust expert dermatology care

📅 Book your appointment today.
📞 (956) 971-0404
🌐 www.oasisderm.com

Derm Index: A Deep Dive into LeukoplakiaOral Leukoplakia is a potentially precancerous condition characterized by the de...
01/31/2026

Derm Index: A Deep Dive into Leukoplakia

Oral Leukoplakia is a potentially precancerous condition characterized by the development of white or gray patches in the oral mucosa, including the tongue, lips, gums, and buccal mucosa. These lesions are typically a result of squamous epithelial hyperplasia and can evolve into premalignant or malignant lesions. While traditionally considered a benign reactive process, studies suggest that up to 20% of oral leukoplakia lesions may progress to oral cancer over the course of 10 years, with the risk being higher in certain subtypes of the condition. The condition is most prevalent in older individuals, particularly those with a history of to***co use, alcohol consumption, or chronic irritation of the oral mucosa.

Pathophysiology and Risk Factors

Oral leukoplakia is often associated with chronic irritation to the oral mucosa, which may arise from mechanical trauma, such as rough dental fillings, ill-fitting dentures, or abrasive tooth surfaces. In addition to physical irritation, to***co use (both smoking and smokeless to***co) is one of the primary risk factors for the development of leukoplakia. Studies have also linked alcohol consumption and poor oral hygiene to an increased likelihood of developing the condition. Furthermore, human papillomavirus (HPV) infection, particularly HPV-16, has been implicated as a potential risk factor for the development of leukoplakia, with studies suggesting that HPV may play a role in the malignant transformation of some leukoplakia lesions.

To Read More >>> https://oasisderm.com/leukoplakia-2/

Download the full PDF:https://oasisderm.com/wp-content/uploads/2025/01/Leukoplakia.pdf

Image Source: dermnetnz.org

Derm Index: Insights into Hot Tub FolliculitisHot tub folliculitis is a localized skin infection of the hair follicles t...
01/28/2026

Derm Index: Insights into Hot Tub Folliculitis

Hot tub folliculitis is a localized skin infection of the hair follicles that occurs following exposure to water contaminated with Pseudomonas aeruginosa, a bacterium commonly found in warm, wet environments. This condition is most frequently associated with the use of hot tubs, whirlpools, and waterslides. It is more common in children than adults, likely due to their increased frequency of hot tub use and more prolonged exposure to contaminated water. The condition typically resolves without extensive treatment but can cause significant discomfort and cosmetic concerns in the affected individuals.

Etiology and Pathogenesis

Hot tub folliculitis is primarily caused by the gram-negative bacterium Pseudomonas aeruginosa, which thrives in warm, moist environments. This bacterium is commonly found in hot tubs and other recreational water sources, particularly those that are poorly maintained, have inadequate filtration, or contain insufficient chlorine levels. Pseudomonas aeruginosa is able to colonize hair follicles and cause infection when the water is contaminated with the bacteria and comes into contact with broken or damaged skin. The infection is typically localized to areas covered by swimsuits, where the skin is occluded and water retention increases the risk of follicular pe*******on by the pathogen.

To Read More >>> https://oasisderm.com/hot-tub-folliculitis-2/

Download the full PDF:https://oasisderm.com/wp-content/uploads/2024/12/Hot-Tub-Folliculitis.pdf

Image Source: dermnetnz.org

✨ Consistent Care = Clearer Skin ✨Great skin doesn’t happen overnight—it’s built with expert care and consistency. At Oa...
01/26/2026

✨ Consistent Care = Clearer Skin ✨

Great skin doesn’t happen overnight—it’s built with expert care and consistency. At Oasis Dermatology Group, we create personalized treatment plans to help your skin stay healthy, radiant, and confident.

📅 Book your consultation today
📞 (956) 971-0404
🌐 www.oasisderm.com

👉 Your skin deserves consistency.

Derm Index: What to know about Adiposa Dolorosa / Dercum’s DiseaseAdiposis dolorosa, also known as Dercum’s disease, is ...
01/24/2026

Derm Index: What to know about Adiposa Dolorosa / Dercum’s Disease

Adiposis dolorosa, also known as Dercum’s disease, is a rare and complex dermatologic disorder characterized by the development of painful lipomas (benign fat tissue growths) in individuals, predominantly in obese patients. These lipomas are typically associated with intermittent episodes of severe pain that may persist for hours or become chronic. The disease is also accompanied by a range of psychiatric symptoms, including fatigue, depression, anxiety, and cognitive impairment. Despite its impact, Dercum’s disease remains underdiagnosed, with a significantly higher incidence observed in women compared to men, and it often presents around the age of 35-36 years, though childhood onset has been documented.

Clinical Presentation

The hallmark of Dercum’s disease is the development of lipomas, which are typically painful and are most often located on the trunk, upper arms, and upper legs. However, in some cases, lipomas may also appear on the head, hands, and feet. The size of the lipomas varies widely, ranging from small nodules, comparable to a grain of rice, to large masses that can reach the size of an apple. Histologically, these lipomas are characterized by an increased density of pain receptors within the tissue, which likely explains the chronic pain commonly experienced by affected individuals.

In addition to the lipomas, patients with Dercum’s disease may experience a variety of associated symptoms, including swelling of the arms and legs, bloating, constipation, weight gain, shortness of breath, and easy bruising. Notably, the pain associated with the lipomas can be severe and is often worsened by the compression of nerves or the surrounding tissue. This chronic pain component makes the disease particularly debilitating, and it is one of the major factors contributing to the functional impairment observed in affected individuals.

To Read More >>> https://oasisderm.com/adiposa-dolorosa-dercums-disease-2/

Download the full PDF:https://oasisderm.com/wp-content/uploads/2025/02/Adiposa-Dolorosa-Dercums-Disease.pdf

Image Source: dermnetnz.org

Address

3100 Buddy Owens Avenue # 105
McAllen, TX
78504

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm

Telephone

+19569710404

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Dr. Rick Lin is a board certified dermatologist practicing in McAllen, Texas since 2006. He is the only board certified Mohs Micrographic Surgeon in the Rio Grande Valley region.

As a leader in the field of dermatology, he previously served as the President of the American Osteopathic College of Dermatology. He is also the member of the Board of Trustees of the Texas Osteopathic Medical Association and the President for District 14. Dr. Lin also serves on several advisory boards for different pharmaceutical companies and contributes his opinion to the development of new medications.

As a researcher in the field of dermatology, Dr. Lin has been active in dermatologic research and has published in peer reviewed journals such as the Archives of Dermatology and the Journal of the American Osteopathic College of Dermatology. He is a member in good standing of American Osteopathic College of Dermatology, American Osteopathic Association, Texas Osteopathic Medical Association, Society for Pediatric Dermatology, and American Society for Mohs Surgery.

As an educator and speaker, Dr. Lin is the program director for the Rio Grande Valley Dermatology Residency Program operated in conjunction with Corpus Christi Medical Center. he is also the dermatology curriculum coordinator for the University of Texas Rio Grande Valley (UTRGV) School of Medicine Family Practice and Internal Medicine Residency Program. He is currently a Clinical Associate Professor for both the University of North Texas Health Science Center at Fort Worth and the Western University of Health Sciences – College of Osteopathic Medicine of the Pacific. He is also a clinical preceptor for the University of Texas Pan American School of Nursing – Nurse Practitioner Program and Physician Assistant Program. Dr. Lin had given lectures to the Valley Advanced Practice Nurse Association, UTPA Nurse Practitioner Program, Physician Assistant Program, University of Texas Rio Grande Valley (UTRGV) Family Practice Residency Program, and American Osteopathic College of Dermatology Annual Conference.