Hello
Thanks for writing to us.

Frequent rashes on ankle and foot , chronic joint pain and recurrent stomach pain with diarrhoea - all these symptoms might happen due to allergy to a common food item like gluten.

You can remain on a gluten free diet for few weeks and see if it improves.

Second possible cause can be irritable bowel syndrome associated with erythema multiforme or eczema.

You need to take it easy to digest oil free food with plenty of fluids along with an over the counter anti diarrhoeal and see if there is any improvement. For skin rashes you can use 1% hydrocortisone ointment topically.

You may get the initial physical examination, relevant tests and treatment done under care of your physician.

I hope my answer and recommendations are adequate and helpful. Waiting for your further follow up queries if any.

Regards.

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