Get a copper brush, and scrub your scalp all over really good 10mins pressing firmly, might hurt a little(but dont be a sissy). You will notice a huge amount of flakes ending up in your hair. Then wash your hair with a shampoo containing tea tree oil (make sure it is a nice natural shampoo). Also use a nice natural shower gel for body with herbal extracts like chamomile or lavender or aloe vera, not something that is commercial and strongly scented with chemicals.

After the shower spray yourself with kewda oil mixed with water (this will pacify the vata dosha which can cause dryness)

You can also massage your body once a week with sesame oil before taking a bath.