Is it red and inflammed? Have you undergone any xrays?
 It is common to have foot pain with RA. What you can do is pain management with heat or ice packs. A physio can help you with the right stretches and physical activities. If weight loss has to be there, a registered nutritionist may come in handy. Low fat, low protein diet is recommended.
Turmeric, garlic, ginger- anti inflammatory herbs help.

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