What is a good treatment or remedy for dry scalp?

Flaky itchy scalp: Most likely this is related to seborrheic dermatitis and one of the dandruff shampoos may help. There are a number of them with different active ingredients so you may have to try several different ones to see what is best for you. Some are: neutragena tgel, tsal; sebulex, head and shoulders, etc. Shampoo daily. If it doesn't work see your dermatologist for medication to put on your scalp.