My toenail is sore on the matrix I had it removed a year ago where phenol was applied is it possible that the matrix was not removed properly?

If it was incomplete. -ablation, it does not mean improperly done, it happens in the best of hands. It is common 2 have an edge or central incomplete ablation, & usually U will have a small horn of a nail grow, & requires a 2nd surgery 2 remove it & do ablation @ the base of the growth. .