Why so i have boil only penis. what is the best remedy?

See answer: Boils on penis or in genital area not all that uncommon. Often related to an infected hair follicle or sebaceous gland. Topical application of moist heat (avoid too hot and burning the skin) to the boil best therapy to help resolve or "draw out" the pus. Squeezing the boil or opening it up on your own if not done properly may be potentially more harmful than beneficial. See md best course.