The best type of care for a bald head is to wash the scalp with shampoo and use sunscreen when outside. Since the scalp is a different type of skin than the rest of the body, regular soap or facial cleanser may be too harsh. Sunscreen helps protect the scalp's sensitive skin from the damaging rays of the sun.
Even though the scalp has little to no hair, shampoo and even a gentle conditioner is still the best way to clean this area of the body. Facial cleanser or body soap are an option, but some may find these have an unwanted drying effect on the scalp, causing it to be flaky. Men's shampoos are the best choice, as these are specially formulated for deep cleaning and moisturizing the scalp. To help keep the scalp hydrated and moisturized, one should be sure to drink plenty of water throughout the day.
For those who have chosen to shave their head, some extra consideration needs to be taken especially when the hair starts growing back. It can be quite itchy, and using a good conditioner and moisturizer can help combat this issue. There is also the question of how often to shave the scalp. A good rule of thumb is to shave it on the same schedule as someone shaves his face or her legs.