I have a rash between my anus and vagina. One or two small spots on skin. And itchy when im hot or fabric to tight?

GYN eval. These lesions would need to be examined, a history obtained & other tests may be necessary in order to diagnose them. Usually the lesions needs to be identified to determine the solution.
See GYN. Your GYN doctor can help assess the area and determine if there is an infection that needs treatment Best Wishes Dr M.