12/26/2025
Most doctors are trained to ignore this diagnostic clue.
Stretch marks. We see them and think: growth spurts, weight gain, completely normal.
But some stretch marks are different. They're purple-red (not pink). They don't follow normal skin lines. And when you press on them, they blanch—the color disappears temporarily.
These aren't your typical stretch marks.
They can indicate a bacterial infection that causes severe psychiatric symptoms in children. Rage. OCD. Tics. Psychosis. All from an infection that creates these distinctive skin markings.
I've had parents completely stunned when I point these out. They thought it was just from growing. They had no idea it could be connected to their child's sudden behavioral changes.
This is a visual clue right in front of us during every physical exam. Easy to evaluate. Costs nothing to check. But most providers have never been taught to look for it.
Once you know what to look for, you can't unsee it. And it might just be the key to solving a case that's been stumping everyone.
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