Red Bumps After Hiking? Check for Chiggers
Red Bumps After Being Outdoors -- Are They Chigger Bites?
They could be. If the red bump is painless and non-itchy, with a black, cap-like eschar in the center, you should be highly suspicious.
Signs of a Chigger Bite
- Painless and non-itchy -- Chigger larvae have an anesthetic in their saliva. You usually feel nothing during the bite, and it doesn't itch much afterward either.
- Black eschar -- After a few days, a characteristic black eschar (like a dark cap) forms at the bite site, surrounded by a red halo. This is the most telling sign of scrub typhus.
- Common bite locations -- Around the waistband, armpits, groin, and behind the knees -- areas where the skin is thin and folded.
How It Differs from Common Bug Bites
- Regular mosquito bite: Raised red welt, noticeably itchy, fades in a few days.
- Chigger eschar: Painless and non-itchy black crust with surrounding redness, lasts much longer.
What You Should Do
- Don't pick at or squeeze the eschar. This can lead to secondary infection.
- Don't treat it like a mosquito bite. Anti-itch cream won't help.
- Go see a doctor. Tell them you've been in grassy or brushy outdoor areas.
- Watch for any follow-up symptoms: fever, headache, or rash.
Important Reminder
If you develop an unexplained fever after outdoor activities and notice a black, scab-like bite mark on your body, go to a proper hospital and make sure to tell the doctor about your outdoor exposure history.