Good Evening: I am 47 years old, in very good health but for the last 5 days, I have been experiencing jt. pain in my knees, feet and also behind my left knee in the area of the hamstrings. My hips are even sensitive. I have no history of arthritis so I am wondering if it could be viral or I should check with my MD about something else....ie: Lyme ds. Any info. is appreciated. Thank you. I am taking aspirin at night and sleeping with heat....