
There are a whole range of reasons, from allergies to sweating, eczema or menopause.
Dermatitis is the wider term for skin inflammation and eczema is a particular type of dermatitis.
Do things like Use an emollient cream, take antihistamines, apply something cool or avoid long, hot showers.
Most likely, it’s down to a recurring skin condition or your skin disagreeing with something. But there are loads of potential reasons, like:
dermatitis – the umbrella term for inflamed skin. We’ll get onto this in a bit...
eczema – a kind of dermatitis that leaves skin dry, itchy and cracked
allergies – often to animal fur, washing powder or soap, cosmetics or jewellery
sweating or heat
insect bites
central heating or air conditioning
taking hot baths or showers
fungal infections, like athlete’s foot
kidney disease – this is rare, but if you’re already at risk, visit your GP

Contact dermatitis is caused by an interaction with a particular substance. It causes dry, itchy and cracked skin.4 There are two reasons a substance gives you contact dermatitis: either it’s an irritant or you’re allergic to it. Look out for flare-ups when you use certain soaps, washing powders or cosmetics. It might also get worse with regular contact with water or even handling raw fruit and veg. You can use moisturisers to help your skin stay hydrated but contact dermatitis should go away once you stop exposing your skin to the trigger.4
Sometimes called pompholyx, this causes tiny blisters on fingers, hands and sometimes the soles of the feet.6 The blisters are itchy and sometimes filled with fluid. It’s usually a long-term condition that comes and goes, lasting a few weeks at a time.6 The exact causes aren't obvious. However, stress, heat, sweating and sensitivity to metal compounds are generally agreed to aggravate it. Using a moisturiser specially formulated for eczema or eczema-prone skin every day might help relieve pompholyx, and if this doesn’t work you may be prescribed a steroid cream by your doctor.6

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16. NHS. Menopause and perimenopause symptoms [Internet]. NHS. Available from: https://www.nhs.uk/conditions/menopause-and-perimenopause/symptoms/