Hello dear understand your concern. It may be due to rough sex, STDs, allergy to condom. Other causes may be. 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 enviorment. Take following advice: 1.Change to a simple, unperfumed soap. 2.Alternatively, buy ‘aqueous cream’ from a pharmacy and use it as body-wash cream (i.e. apply a small amount and rinse off). 3. Put two handfuls of salt in the bath, but no other additives 4. Do not use ‘biological’ or ‘enzyme’ powders when washing your underpants 5. 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 ormulated penis vitamin formula- Man 1 Man Oil-contain: with 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. Apply anti fungal clotrimazole cream if severe or not resolved. If not responds, consult the doctor and test for STDs Hope this may help you. Best regards Dr. Sagar