Although inverse psoriasis is most common in the genital area, it can rear it's ugly head as a red rash on buttocks or even in the folds under the belly.
Remember, inverse psoriasis is most common in the areas of the body in which moist skin (from sweating) rubs together. This is why it is most common in overweight people.
It is possible you can have another skin condition or a heat rash. You may even be experiencing an allergic reaction to something. You should always check with your doctor. This way, you can start the proper treatment.
