They might be painful and itchy, which can lead to scabs. The skin disorder is most common in ... but they can also develop on the scalp, legs, and arms. In most cases, the blisters are itchy.

Scabs on the scalp can be caused by inflamed hair follicles or inflamed skin. It can also be caused by infestations of lice or an infection called scalp ringworm. In rare cases, scabs that bleed ...