Thank you posting your query on “Ask the Doctor”
I have seen the photograph.
It appears to be macular rash onh on the glans penis.
It could be fungal rash or rash of contact dermatitis.
The actual rash appears underneath your foreskin on the glans, and the red areas appear to be either due to a skin fungus caused by yeast, or from friction from rubbing associated with inadequate lubrication during sex or masturbation.
Contact dermatitis is a local reaction to foreign particles due to contact of any new material, cloths, soap, lubricants and condom which is not accepted by your body. Sometimes certain food items and perfumes may also develop allergy.
A fungal skin infection is red, round and itchy.
A fungal skin infection is contagious disease caused by direct contact like unprotected sex or through fomites. A fungal skin infection of the body can be spread on towels, clothing, or equipment.
Personal hygiene plays important role in preventing self from such infections.
Well, the rash may subside itself. Avoiding allergens is a key to protect ourselves from getting such rash.
For proper diagnosis along with physical examination, detailed sexual history and certain blood tests are required.
If you have contracted this thing due to sex, it is a sexually transmitted disease.
You may require doctor’s consultation if rash persists or reappears.
Wish you a good health.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.