Hello dear Understand your concern. I think it is due to rough sex with hygiene problem Following are the cause of your problem 1. Hygiene problem: If you not wash penis area, segma that is deposited under fore skin irritate penile area and produce reaction 2. Balanitis: inflammation of the penis, caused by poor hygiene, especially insufficient washing under the foreskin area. Thrush, psoriasis, skin sensitivity or allergy to a product used on the penis (such as soap or lubrication) 3. overuse - as in too frequent, too long or too rough sexual activity 4. Fungal infection: in warm environment. Take following advice: 1.Change to a simple, unperfumed soap. 2. Put two handfuls of salt in the bath, but no other additives 3. Showering after a workout, changing underwear, using a clean towel to dry off with and not redressing until the area is completely dry 6. Use Man 1 Man Oil that contain vitamins, minerals and shea butter- it moisturizes the skin and prevents flaking or cracked skin while revitalizing and enhancing the sensitivity of the penis 7. Use safer sex technique: use condom and oral diaphragm 8 Apply anti fungal clotrimazole cream if severe or not resolved. Hope this may help you. Best regards Dr. Sagar