Iam a male with age 75 years ,weight 80 kgs recently when I bend down it creates unbearable pain on my left leg , it occurs while i sit on commode , while I try to drive scooter and sometimes when i sit down for more than 20 minutes, its unbearable pain. The pain is immense on left leg only on leg cap, left of left leg pindlis and on thigh. I got my medical checkup done everything including kidney , heart , sugar etc are ok , only ESR IS HIGH which is 50. I do not have anyother problem but only a severe pain sometimes which occurs at when i bend down. What do you think this problem is .. is it related to veins or bones. I do have mascular contraction and low on calcium upon checks. what do you suggest ?