Nowadays there are lots of hair and skin problems that people are facing. Dandruff and dry scalp are one of them. Some people think that dandruff and dry scalp are same but it is not so. There are lots of differences between dry scalp and dandruff. Dry scalp is caused due to loss of moisture from the skin. It can be caused by the use of soap, strong detergents, product build up, cold weather, hard water and diet.