South Texas Sinus Institute

South Texas Sinus Institute We solve sinus problems, allergies and other ear, nose and throat conditions in South Texas. 👃👂👄
Call us @956-661-8200

4865 N Mccoll Rd
Mcallen,TX 78504
Phone: (956) 661-8200, toll free (855) 99-SINUS
Fax: (956) 661-8205

At South Texas Sinus Institute we have a team of experts ENT staff, including physicians and clinicians who are dedicated to providing you with the highest quality of care. You’ll find that all of our physicians are board-certified in Otolaryngology. Our clinicians have extensive training in ENT and meet all of the highest education standards. If you are looking for a sinus doctor in South Texas to provide you with relief from sinusitis, snoring, or even sleep apnea, please do not hesitate to give South Texas Sinus Institute a call. Our team of experienced ENT surgeons and physicians are ready to help.

That's a wrap this Friday with Dr. A. Guillaume. Great work Team!✨️👏
03/06/2026

That's a wrap this Friday with Dr. A. Guillaume. Great work Team!✨️👏

03/06/2026

👏🎉Our team at South Texas Sinus Institute is more than employees — they’re family. Each person plays a vital role in supporting our mission and helping our practice serve the community.
Thank you for your hard work, dedication, and teamwork every single day.

Behind everything we do at South Texas Sinus Institute is an incredible team. Every department, every role, and every pe...
03/06/2026

Behind everything we do at South Texas Sinus Institute is an incredible team. Every department, every role, and every person helps make our work possible. THANK YOU! 🙏🏻

We are so grateful for our STSI family! 💖

Hello March! 🍀 In the Rio Grande Valley, warmer weather often means the start of allergy and sinus season. If you're not...
03/04/2026

Hello March! 🍀 In the Rio Grande Valley, warmer weather often means the start of allergy and sinus season. If you're noticing more congestion, sneezing, or sinus pressure, you're not alone. Our team is here to help you breathe easier all season long.

956-661-8200 📞

Allergies acting up? 👀🌼 Check the pollen report! 🌳🍃If your eyes are driving you crazy, your nose won’t stop running, or ...
02/24/2026

Allergies acting up? 👀🌼 Check the pollen report! 🌳🍃

If your eyes are driving you crazy, your nose won’t stop running, or you’re stuck in sneeze mode… those are symptoms — not a diagnosis.

“Allergies” is a term we use to describe how your body is reacting, but the real question is why it’s reacting. Is it pollen? Dust? Pet dander? Something else entirely?

Don’t ignore the signs or just power through it. Getting to the root of your symptoms is the first step to real relief — not just temporary fixes.

Breathe easier. Live better. 💛 Call us! 956-661-8200

It's Kids ENT Month!Did you know babies aren’t born with all of their sinuses?👶 At birth, babies only have maxillary (ch...
02/21/2026

It's Kids ENT Month!
Did you know babies aren’t born with all of their sinuses?

👶 At birth, babies only have maxillary (cheek) and ethmoid sinuses — and they’re very small.
👦 Around age 6–7, the frontal sinuses (forehead) begin to develop.
🧑 By the teenage years, the sphenoid sinuses are fully formed.
✨ Full adult sinus development is typically complete by the late teens.

Sinus health truly grows with you. 💙

February is American Heart Month ❤️Your heart and your sinuses may seem worlds apart… but they’re more connected than yo...
02/19/2026

February is American Heart Month ❤️

Your heart and your sinuses may seem worlds apart… but they’re more connected than you think.

Did you know?

🔹 Some over-the-counter decongestants (especially those with pseudoephedrine or phenylephrine) can raise blood pressure and increase heart rate.
🔹 Chronic nasal congestion can affect sleep quality — and poor sleep is linked to high blood pressure and heart strain.
🔹 Struggling to breathe properly at night may trigger episodes of rapid heart rate (tachycardia) in some patients.

If you have high blood pressure or heart concerns, it’s important to talk with your provider before taking certain allergy or sinus medications.

At South Texas Sinus Institute, we don’t just treat symptoms — we look at the full picture so you can breathe easier and protect your overall health. ❤️

Healthy breathing. Healthy heart. Stronger you.

02/17/2026

🎂✨️🌸Happiest of birthdays to Maria! Enjoy your 365 day around the sun 🌞 WISH BIG 🧁

02/17/2026

🎉🎈✨️Cheers to 11 Years Rachel G. We appreciate all your hard work and dedication. Keep shining! ✨️👩‍💻🖊 🖥

Wishing all of our patients, families, and community a joyful Lunar New Year filled with health, happiness, and prosperi...
02/17/2026

Wishing all of our patients, families, and community a joyful Lunar New Year filled with health, happiness, and prosperity. 🧧✨

As we enter the Year of the Fire Horse, a symbol of passion, strength, and powerful forward momentum, may this season spark renewed energy and bold new beginnings.

May this year bring clear paths forward, abundance in every area of your life, and continued wellness for you and your loved ones.

Thank you for trusting us with your care — we look forward to another year of helping you breathe easier and live brighter. ❤️

Happy Presidents’ Day! 🇺🇸Today we celebrate leadership, service, and the enduring spirit of our country. We are grateful...
02/16/2026

Happy Presidents’ Day! 🇺🇸

Today we celebrate leadership, service, and the enduring spirit of our country. We are grateful to serve our community and remain committed to caring for your health every single day.

Here’s to honoring the past while continuing to build a healthier future together. ❤️

02/13/2026

Happy Birthday to Dr. H 🎉
Our first-class boss, leader, and the standard we all try to keep up with. Wishing you a year filled with good health, big wins, and everything you deserve. We’re grateful to work with you every day 🥂✨

Address

4865 N McColl Road
McAllen, TX
78504

Opening Hours

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

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