<s>[INST] I tripped yesterday, I seemed to jar my foot. Straight away I had pain on top of my foot and struggled walking. Now pain still here, have a painful lump on top of foot and difficulty moving toes, especially big toe. I never banged my foot and I am confused what is causing this [/INST] hi, greetings from HCM.Since you had heavy exertion you may have sprained your foot and as a result you have developed painful lump on top of foot.you have to consult an orthopedician and get an x-ray of your foot to rule out fracture.You have to check uric acid level in blood as it can produce painful gouty swelling of big toe </s>