Hi there. As a former military doctor with lots of sweaty soldiers to look after I saw a lot of poor guys with tinea cruris and this is how I usually helped them: 1. Wear only cotton boxer shorts (or go without underpants altogether to get the air flowing!) 2. Don t overwash the area with harsh soaps - you are not dirty! 3. Use a triple cream containing a moderately potent steroid, an antifungal and an antibiotic - these are prescription only, so you will need to ask your doctor about it. 4. Use an antifungal foot powder (but don t use talc - it just turns into slime) - these can usually be bought over the counter. I think you will find that you can get through the summer in this way with minimal suffering - although there is no cure for this condition in the long term.