พบแพทย์เรื่องผื่น

Let me take a look. When did you first notice it? Have you been exposed to any new plants, foods, or products?

This looks like contact dermatitis — possibly from poison ivy or poison oak. The rash appears as red, itchy bumps in a line pattern, which is typical of plant contact.

No, it's not contagious. But wash all the clothes you were wearing that day — the plant oil can stay on fabric and cause a new reaction.

I'll prescribe a topical steroid cream. Apply it twice daily. Take antihistamines for the itching. Avoid hot showers — they make it worse. Cool compresses will help.

Usually 1 to 3 weeks. The cream will speed up healing and reduce itching. Come back if it gets worse or you develop fever or pus at the rash site.

Are you having any difficulty breathing or swelling in your throat? This is important.

Do you know what triggered it? Did you eat anything new, take any new medication, or get stung by an insect?

Shellfish allergies can develop at any age. I'm going to give you an injection of epinephrine as a precaution, and IV antihistamines. We need to monitor you for at least four hours.

Allergic reactions can have a second wave — called a biphasic reaction — hours after the first. It's safer to monitor you. I'll also prescribe an EpiPen for you to carry.

Of course. Remove the safety cap, press firmly against your outer thigh — it works through clothing — and hold for 10 seconds. Then call 911 immediately.