Hello,  in stich line small minute nerves which r not visible by nacked eye comes in between stich line. So occasionally when receive stimulus this type of sensation may be there. LOCALLY apply  steroid cream. But you have to consult a general surgeon. This is a free open site and it is strictly instruted not to write any medicine or PRESCRIPTION even punished by bycot the queries in my site. So CONSULT.ok.

It's better to consult General Surgeon.