<s>[INST] I am having recurring pain in my feet and leg calf and knees. At first it was morning pain and stiffness in both feet. I do exercises for the same. Now all of a suddden i ve terrible calf pain in the back of right leg above ankle region. It seems very tender to touch. [/INST] Hello, As what I feel is you need to check up with you Rheumatoid factor. Look out for some blood and urine routine. As the morning stiffness in small joints is due to mostly Rheumatic factor, but we cannot claim it is the one as there are other numerate factors to consider.  Why don't you actually think of doing a blood routine along with Rheumatic factor profile which can help us understand more about what could have caused this? Based on the provisional diagnosis the physician might prescribe some useful Chat Doctor.  Hope I have answered your query. Let me know if I can assist you further. Take care Jay In </s>