| Alternative Names: |
Common ichthyosis; Fish scale disease
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| 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 a child is 4 years old. In most cases one parent and one-half of the children will be affected. It usually disappears during adulthood, but may recur when elderly.
Ichthyosis involves development of dry, scaly skin. It is usually most severe over the legs but may also involve the arms, hands, and trunk in some cases. It is usually associated with many fine lines over the palm of the hand. The condition is often more noticeable in the winter. It may be associated with atopic dermatitis, keratosis pilaris (small bumps on the back of the arms), or other skin disorders. |
| Signs and tests: |
| The diagnosis is made primarily on the basis of the skin appearance. The health care provider may need to rule out other possible causes of dry, scaly skin. A family history of similar skin dryness is often obtained. |
| Treatment: |
| Intensive localized moisturizing may reduce symptoms. Creams and ointments are more effective than lotions. They are best applied to wet skin immediately after bathing. The use of mild, non-drying soaps is encouraged. Use of moisturizing creams that contain keratolytic agents (chemicals that help skin to shed normally), such as lactic acid, salicylic acid, and urea, are often very helpful in this condition. |
| Expectations (prognosis): |
| Ichthyosis may be annoying but seldom affects medical health. It usually improves during adulthood but may recur when a person becomes elderly. |
| Complications: |
| Secondary bacterial skin infection may develop if scratching causes openings in the skin. |
| Calling your health care provider: |
| Call for an appointment with your health care provider if ichthyosis symptoms persist despite treatment, if symptoms worsen, lesions spread, or if new symptoms develop. |
| Prevention: |
| If you have this condition, be aware that your children are at risk for developing it. |
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