Could a beach holiday be causing your heel pain?

A reader thinks they may have trodden on something sharp in the sand. Dr Mark Porter explains why a common foot condition could be the real cause.

Two people walking on the water's edge of a sandy beach at sunset
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Saga river cruise ship Spirit of the Rhine in Koblenz
Win an all-inclusive Saga river cruise to Germany

Your chance to win a 7-night cruise for two on board Spirit of the Rhine, worth more than £4,000.