What causes rid of acne fast without buying any products?

Forgive my frankness: This is like asking how to overcome hunger without buying food. Acne is a serious, chronic, often devastating disease. It is not a hygiene or lifestyle problem, and the online home remedies (lemon squeezes, sleeping with your body coated with honey) won't help. If you are responsible for someone who needs acne treatment, get them to a scientific physician now or you'll regret it for a lifetime.