Definition of Ichthyosis vulgaris:

Ichthyosis vulgaris is a common skin disorder passed down through families that leads to dry, scaly skin.

Causes, incidence, and risk factors:

Ichthyosis vulgaris is one of the most common of the inherited skin disorders. It may begin in early childhood, before age 4. The condition is inherited in an autosomal dominant pattern. That means you only need to get the abnormal gene from one parent in order for you to inherit the disease.

The condition is often more noticeable in the winter. It may occur along with atopic dermatitis, keratosis pilaris (small bumps on the back of the arms), or other skin disorders.