Itchy scalp can be caused by a number of conditions, from simple factors such as dry scalp, dandruff, seborrheic dermatitis, to more serious ones, like scalp psoriasis, contact dermatitis, head lice infestation, scalp ringworm, tinea amiantacea, lichen planus, hair follicle inflammation, neurogenic excoriation, and pyogenic infection of scalp. It is important to identify the root of the problem. However, meanwhile you can try an itchy scalp home remedy that will help ease the discomfort.