How long can folliculitis last?

Lifetime: There are several common causes. One that's relatively little-known is pityrosporum; it's easy to treat if you figure out what it is. Best wishes.

Depends: Let untreated, if may go on for years, with the infection spreading from one follicle to the next. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex, if you have sex.