Ichthyosis

Also called Ichthyosis vulgaris or Fish scale disease

Ichthyosis is a group of skin conditions that cause widespread, persistent dry and scaly skin. Most types are inherited and appear at birth or in early childhood. The most common type, ichthyosis vulgaris, is usually mild. Rarer types can be more severe.

Last updated Nov 9, 2026

What it is

It is not contagious and there is no cure, but symptoms can be managed.

Daily moisturisers, bath oils and creams that help remove scales are the main treatment. Severe types may need tablets prescribed by a dermatologist.

Common signs

  • Dry, scaly skin, often on the legs and back
  • Fine white or grey scales
  • Thickened skin on the palms and soles
  • Worse in cold, dry weather

How it is usually diagnosed

  • Examination of the skin
  • Family history
  • Genetic testing or skin biopsy, sometimes

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Dermatology letters
  • Genetic test results
  • Treatments that work

Questions to ask your doctor

  • Which type of ichthyosis is this?
  • Which moisturisers work best?
  • Could my children inherit it?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Red, hot, painful skin with fever, or a newborn with very tight or cracked skin: get urgent medical help

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

Sources