You probably have "Body dysmorphic disorder" which is characterised by "preoccupation with an imagined defect in appearance that causes clinically significant distress or impairment in important areas of functioning".
If a slight physical anomaly is actually present, the person's concern with the anomaly is excessive and bothersome.
It is an "Obsessive compulsive
So it is advisable to consult a psychiatrist
and get proper treatment