Knot on right side of back with pain when walking. have to pull knees up to cough or sneeze cause is so painful. for 3 weeks now.

Seek attention : You need to see a physician for further evaluation. A physical examination needs to be preformed. Based on the outcome of the examination further testing can be done. If it is a dermatoligic problem it can be removed. If finding suggest a problem which is more extensive other tests such as xrays and blood work may be needed.