<s>[INST] i am 30 years old and i have been mustarbating since 20 years. Now i have back pain more when i do more mustar bation on a day. My back pain was starting 6 years ago. I never get any ache for creating back pain. I sleep in strong bed. What is he problem concerning in this state. [/INST] Hi, Thank you for asking Chat Doctor. I have gone through your query. Masturbation doesn't have a side effect of back pain. But the back pain can be due to the awkward positions you assume while masturbation. So in such case those positions should be avoided while masturbating. You can also do back strengthening exercises which help also. If pain is more than short course NSAIDs like nimusulide and muscle relaxants like thiocolchicoside will help. Hope this may help you. Let me know if you have any further queries. Thanks </s>