Nobody knows exactly why keratin builds up, but the condition is thought to run in families.

And like most things, prevention is better than a cure.

Experts suggest lukewarm rather than hot showers, regular moisturising and gentle exfoliation of rough skin to stop the unsightly bumps in their tracks.

It’s also a good idea to stick to gentle, non–perfumed cleansers.

And the good news is that a lot of people find the condition clears up in the summer.

To find out more, visit the NHS website.

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