We saw something in while scanning in right side of brain , but couldn't find wether it is brain tumor or something else . i only had pain in left side for only 3 days back then i was always fit and fine . is it brain tumor or something else?

We could not give you an appropriate advice with this info. You should wait and discuss with the doctor who ordered the scan or the radiologist who read the scan. As doctors, if there is something suspicious we always do follow up test(s) if needed to clarify. If you had CT scan, next step could be MRI or if you had MRI, next step could be MRA, EEG, etc. It is our job, you should not concern much.

Your post is too vague to provide specific interpretations, and impossible to correlate your prior pain with "something". We can provide much better responses if provided with concrete objective data. Please repost with specifics, or consider virtual consult for a more comprehensive approach. (www.connect@healthtap.com)