X-linked ichthyosis is a genetic skin disorder caused by a mutation in the STSL gene, which is located on the X chromosome. This condition primarily affects males, as they have only one X chromosome. Individuals with X-linked ichthyosis typically experience dry, scaly skin that may appear thickened, especially on the arms, legs, and torso. The severity of symptoms can vary, but the condition is usually diagnosed in early childhood. While there is no cure, treatments such as moisturizers and topical therapies can help manage the skin's appearance and improve comfort. Regular dermatological care is recommended for those affected.