There are multiple conditions that can cause a rash on the penis or in the groin. Rashes are commonly itchy and can be caused by something as simple as an irritation to certain soaps or something as complex as an infection caused by fungus, an STD or pubic lice. Scabies are mites that can be passed from close contact with an infected individual, including sexual contact. The mite bites leave red itchy spots that resemble a rash on many parts of the body, including the groin and genitals. Pubic lice, also known as crabs, can leave red dotted spots that look like a rash.
How to Get Rid of Penis Irritation
red blotches on the end of my penis? | Yahoo Answers
Blotchy Red Penis? Could Be Henoch-Schonlein Purpura
More often than not, it will be something that is far less serious but a condition you will want to get checked out nevertheless. A non-infectious penile skin condition is one that you cannot get it from or pass it to another person. While this shouldn't suggest that you can ignore it, a non-infectious skin condition tends to be less serious than an infectious one. While more irritating than problematic, the condition may be caused by harsh chemicals, abrasion, or an allergen your doctor can help identify.
For many men, especially those with lighter skin, a red penis is not an unusual sight. After all, when blood rushes to the penis to make it erect, it tends to take on a reddish hue. But sometimes a red penis can be a sign of a possible penis health issue, especially when that redness presents as blotches or rashes.