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The gals gave you good hair care info. I also rubbed olive oil and vitamin e liquid (NOT oil) on my bald head. It was nice!
Remember, it is absolutely critical to hydrate. It is important. If he can't/won't drink water, get ginger ale, tea, whatever. Encourage him to drink small sips several times an hour if he can't drink 8 oz at once. I drank at least a gallon of water a day. It really helps.