I had a bad habit of plucking moustache hair with teeth. Now the hair there don't grow. Is there a remedy to re grow? (photo)

The best treatment is to have a hair transplant in the mustache area. There are no enemies or products that would help with mustache. Hair transplants in the main age area of performed by an experienced hair restoration Doctor is very natural and successful. 

plucking hair causes hair loss. If it does not regrow in 6 months, it is permanently lost. The only way then to get it back is with a beard transplant. I wrote about this before (see below)