<s>[INST] I have started walking - trying to speed walk.  I have a tight, hard spot on the lower left leg.  Feels like a tight muscle.  It is not read, but it is slightly larger than my other leg.  What should I do for this?  Or is this something I should see my doctor forI mean it's not "red". [/INST] Hello dearWarm  welcome to Healthcaremagic.comI have evaluated your query in details  .*  There are different  issues  which may present  as     -  wart  -  hematoma  or cellulitis  -  sebaceous  cyst or  lipoma  -  others*  Must visit your doctor and get  clinical  examination .Hope this  will help you for sure   .Wishing you fine recovery .Welcome for any further  guidance .Regards  . </s>