Dealing with Itchy skin: 
Itchy skin is a common symptom of MPDs. People who these disorders often suffer from water-induced itching (aguagenic pruritis). The exact cause is not known, and this makes itching difficult to treat. You may feel moderate to severe itching, burning, pricking or stinging after contact with any type or temperature of water. A bath or shower, a swim in the sea or a swimming pool, and even your own sweat can provoke the symptoms, which can last from ten minutes to two hours. The arms, legs and trunk are usually the worst affected. Symptoms can be seasonally dependent, varying from summer to winter.

Some patients have found non-medical ways to relieve these symptoms. There are no guarantees that these will help everyone, but you may find something that helps.

Vary the temperature: At the end of your shower, turn the water temperature to as hot as you can bear, and aim at those places that tend to itch. Use a heat pad or hair dryer on the places that tend to itch. Alternatively, try ice or ice water on the affected areas.

Wrap up warm: After a shower put on warm, tight fitting clothes. Sometimes it's the cooling down after a shower that triggers the irritation.

Change how you wash: Try a relaxing bath rather than than a shower, and try adding sodium bicarbonate to the bath water.

Change your cleanser: One remedy that works well for some patients is to use an emollient cleanser (like E45) instead of soap, and to use a medicated shampoo (e.g. Polytar).

Change the time: If you prefer a shower to a bath, try showering at night rather than in the morning.

Break out in a sweat: Participating in sports (and sweating) before your shower may also reduce the severity of itching.

Choose food and drinks with care: Stimulants such as coffee and chocolate or sugar may make the itching worse. 

Rub, don't scratch: Try rubbing or massaging your skin gently in a circular motion

Try whatever works for you: There are reports that spraying deodorant inside nightclothes can reduce itching.

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