>>936272235 (OP)If it is "jock itch", and not an std or something else, then try ringworm cream (anti-fungal) and alkaline soaks. Saltwater and especially sodium bicarbonate (baking soda) will help remove it.
One Anon was saying to tape it to the infected area, baking soda, until it heals. It will likely sting a bit, but it will destroy the fungus.
Also, the fungus can stay alive for a very, very long time on surfaces and cloth. So be aware of that.
Wash your clothes. Practice good hygiene, and use common sense.