What is the solution for the periformis butt disease. What should I do? I have pain from butt down the whole leg. As well as the knee. Help?

Piriformis syndrome. Piriformis syndrome is much less common than other causes of leg and knee pain, like sciatica or disc compression of lumbar roots. Here is a good discussion on piriformis syndrome: http://en.Wikipedia.Org/wiki/piriformis_syndrome i suggest you consult a neurologist to evaluate the actual diagnosis and then suggest specific treatment options.