This is embarrassing...but the end of my spine to the top of my butt crack is really red and hurting I can t stand, sit, or lay down it hurts so bad...also like a knot there also..I m used to lot of pain cause I have RA and fibromyalgia ..any answers would be appreciated....it s not on spine more the top 3 or 4 inches of my butt
Rheumatoid arthritis and fibromyalgias are two different entities the present complaint pain in the lower spine from top of the buttock to the lower end of spine with redness over that area probably suggests some infectious/ inflammatory lesions. Do you have any Chat Doctor?  Do you history of weight loss fever and increase in the pain during the nights which probably suggests tuberculous involvement? Any history of trauma? Kindly take an x-ray lumbosacral AP and lateral views to check for any lumbar spondylosis and consult a neurologist for opinion, and he may ask you if needed an MRI.