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What is this itchy rash on my chest?

I have a red, itchy rash on my chest, right in the middle. I'm a healthy 30 year old male. Could it be an allergic reaction from laundry detergent? I just starting taking my clothes to a drop off service.
There are several different possibilities here, and definitely an allergic or sensitivity reaction is one of them. Often people with sensitive skin will have a contact reaction to new detergents or chemicals. This can lead to areas of redness and itching as you describe. The best way to know if this is what is going on is to eliminate the potential source of irritation (e.g, the cleaning service or the new detergent) and see if things improve. Keeping the skin well moisturized in the interim and applying some over the counter steroid cream for itch should help as well. "Heat rash" is another common complaint and occurs when excessive sweating leads to temporary plugging of sweat glands. Small red bumps appear which may be itchy. Heat rash generally responds to just keeping the skin clean and dry. Folliculitis is an infection of the hair shafts which leads to redness around the base of the small hairs in the skin, sometimes with a small pimple. In addition to heat and friction, like with heat rash, other things that predispose to folliculitis include waxing and shaving the skin. Again, it tends to respond to good skin hygiene. If the condition worsens or doesn't respond to these simple measure, go see your primary care doctor, who can diagnose your condition formally and suggest an effective treatment.
This answer is for general informational purposes only and is not a substitute for professional medical advice.
If you think you may have a medical emergency, call your doctor or (in the United States) 911 immediately. Always seek the advice of your doctor before starting or changing treatment. Medical professionals who provide responses to health-related questions are intended third party beneficiaries with certain rights under ZocDoc’s Terms of Service.

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