Hi. Thanks for your query. Noted your history of scrotum rash that is covering testicles. They seem between the testicles is un-irritated. It slowly spread over with in the last 3 months. Used 1% clotrimazole cream, and hydrocortizone 2.5% clotrimazole 1%. So eliminated fungus and eczema. It s not itchy only slightly sore and some times irritated. It s red almost all the time, some days it looks better than others. There is no flaking skin. You have even tried powder and tea tree oil. Nothing is working. The commonest cause of such an occurrence should be identified and avoided for any treatment to be successful and the commonest reason is the hot and humid atmosphere where you live-in or work. Another reasons is less cleanliness, tight underwear and pants. Hence the first treatment i to avoid all the causative factor. You have to clean the area 2-4 times a day with plain tap water and then dry it with hair dryer. Apply liquid povidone iodine o make the area sterile. If there is still no results, consult a Dermatologist.