Ask the expert

Q EACH SPRING, I GET AN ITCHY RASH ON MY NECK AND ARMS, WHICH GOES BY ITSELF. COULD THIS BE AN ALLERGY?

A This sounds like polymorphic light eruption (PLE), caused by sensitivity to ultraviolet light in the sun’s rays (which can penetrate windows and thin clothes). It affects over 10% of us, is more common in women and people with fair skin and often disappears as we get older.

The red rash may look prickly, gritty, blistery or resemble ‘targets’ and is very itchy; you may also feel