Good afternoon Doctor, I would like to consult my grandmother who is currently 86 years old. Since 2 months ago, he started to complain about his right knee. Never before had such a complaint appeared. Pain was suddenly felt (no history of falls) accompanied by swelling and when I checked his knee felt warm even though it was not red. He went to a medical rehab and was given physiotherapy, then repair. Recently his right leg started to feel pain again, but this time moving to the thigh area, is this related to the autoimmune rheumatic disease Doc? thanks.