i noticed a small plum like lump on my lower right side of back?
most probably this could be a bursitis (inflamed bursa) or a fibrosis in a muscle secondary to muscle strain in the past. your leg pain if it is light it could be due to either a very small disc bulge or piriformis syndrome. get examined by an orthopedist to know which of these is causing your leg pain(disc or piriformis). then you may need 6-8sessions of physical therapy to treat your problem. thanks.