After buying and using an emollient for dry skin, this mother was rather concerned that it had burnt her child's face leaving pale areas on both cheeks.

Questions

1. This is a rare side effect of emollient use that is likely to be permanent.

2. The cause of this condition isn't known

3. The presence of this in a child means they are more likely to develop vitiligo in later life.

4. The condition is more common in skin types 5 and 6

5. As this is a self limiting condition no treatment is usually required.

Discussion

1. False This is a relatively common condition called Pityriasis Alba which is seen almost exclusively in children. It is estimated that around 5% of all children will be affected at some time during their childhood.

2. True Although the cause of the condition isn't know some believe it to be more common in atopic individuals.

3. False There is no association between this and vitiligo, which is very difficult to treat.

4. False Although the condition is usually more apparent in those with darker skin the incidence is the same in all races.

5. True In most cases no treatment is required. If there is an associated pruritis then emollients may help. In more severe and persistent cases topical steroids, pimecrolimus, and PUVA may help.

Author: Dr Nigel Stollery, GP, Leicestershire and Clinical Assistant in Dermatology Leicester Royal Infirmary