Kinda short notice to see a dermatologist by the 15th. I'd have to wait a month to get an appointment. Make an appointment anyway, but meanwhile...
I already know what my occasional rash is -- tinea cruris. Had it diagnosed years ago. Probably picked it up in high school when I got my first bout with athlete's foot. It never goes away. Best we can do is keep it dormant. Besides the usual hygienic stuff and appropriate skin balms , here's what worked for me:
- Wear wicking fabric compression boxer-briefs under padded bike shorts. Yeah, I know the "rules". The rules aren't right for everyone. Part of my problem is a saggy, baggy scrotum -- seems to be a genetic thing, runs in the family. I need the extra support to keep the boys comfortable. No padded shorts I've tried offer adequate support by themselves. I'm more comfortable wearing Champion wicking fabric boxer-briefs under my various padded bike shorts. It's the same type of fabric used to make our tighty shorts and pads anyway, but almost as ultra-thin as women's stockings. Frank and the beans are supported by a mesh pouch that's cool and dry, with just enough support without mashing anything uncomfortably. Our nether regions won't suddenly explode into a mist of blood and pus just because we add an ultra-thin layer of the same dang fabric. With my slightly more padded saddles, or short rides (up to 20 miles) I can wear just the Champion underwear and baggy shorts or jeans and be comfortable.
- OTC antifungal cream, with 2% miconazole nitrate for routine use at the first hint of outbreak.
- Prescription Lidex gel when it gets worse. Very sparingly. Doesn't take much. Prolonged use can cause defatting, thinning of the skin and make us more prone to skin cracking.
- Hydrogen peroxide, including on the padding of the shorts.
- Careful attention to our basic everyday health to minimize outbreaks. Stress, poor diet, etc., contribute to outbreaks. The first place I notice symptoms isn't usually my feet haven't had that problem in decades) or groin, but between my fingers. At the slightest sign of any slight bumps and itching, I know something's wrong. Usually stress, etc., but it also appears I'm prone to rashes from ibuprofen. My doctor switched me to oral diclofenac anti-inflammatory. I hadn't had a skin problem in a year until very recently when, sure enough, some minor itching and irritation coincided with some very stressful life stuff.
Mostly suggestion 1. Can't hurt to try.