<s>[INST] I am a 62 yo man who suffers severe back pain on the lower right side of my back. Pain is very very severe when in certain positions, particularly when I try to stand up from being seated. Pain is like a muscle spasm and appears to "lock".  On occasions pain affect lower base of spine on both sides. Ive had problem for many months but has got much worse recently. My doc is largely puzzled but offers paracetamol. can u help?  ...SB [/INST] Hi, thanks for writing to Chat Doctor. As your pain is occurring only during certain positions and is not present at rest, the most probable reason could be a STRAINED MUSCLE. The general guidelines of management are as follows -* avoid activities which puts additional strain on the involved muscles* Ice packing to alleviate the acute pain* Once the acute pain subsides, Moist heat fomentation is to be done to relax the muscles* Physiotherapy to stretch and strengthen the back muscles* Occasional analgesics & muscle relaxants as needed. Hope this information is helpful. Good day </s>