At least twice a week, exfoliate your chin with a face scrub. This eliminates dead skin cells from the skin's surface, allowing hair to grow more easily in the region. Dead skin cells may be clogging your hair follicles and limiting new development if you don't exfoliate. Consider taking biotin. This vitamin promotes hair growth by helping connective tissue repair itself after injury, so it also helps when trying to grow back after shaving. If you want to grow out your existing hair, use a mild shampoo to remove any residue that could be stopping your hairs from growing. Conditioning your hair too often will only make it dry out over time - save your conditioner for when you wash your clothes - but do give yourself a high-quality treatment every other day or three months depending on how much hair you have. If you're looking to grow out your beard or mustache, follow the same guidelines as for scalp hair, just use a product designed specifically for beards. Hair grows when there is blood flow to the area. So if you want to grow hair on your chin, first check whether or not you have any blood vessels near your facial hair. If there are, then this means there is already blood flow to that part of your body, meaning it's possible to grow hair there. However, if there are no blood vessels involved, this means you cannot grow hair on your chin because there is no way for it to receive enough blood flow to become healthy again.