I have pain in my stitches after 3weeks of...

Post operative incision site pain 
During The laparascopic procedure the surgeon will do separate skin incions 3-4 in the abdominal wall to advance the instruments of laparasopy and at the end of the procedure the inner wall will be closed by absorbable stitches that will disappear in a matter of 4-6 weeks and outer skin stitches of a non absorbable material that  should be removed after 10 - 14 days. If you still have some pain at the incision site then this is propably because of the healing process then you should take analgesia Diclofen 50 mg tab twice a day and consult your treating surgeon if sympomes perisisted 
Required Investigations 
After doing a proper physical exam you should do cbc to uncover any sign of infection, A CT scan of the abdomen to detect any sign of accedental omental stucked to the inner stitch or abdominal wall collections should be done.
Possible causes 

• Normal Healing process 
• surgical site infection 
• Surgical site seroma or hematoma 
• Accedntal ligature of inner abdominal content with the stitch

Our advice
You are adviced to have a well balanced diet, avoid smoking and perform daily regular excercise.