I have had a cut on the side of my tongue for 6 months and i can't get rid of it. any help please.

Seen an ENT doctor : A non-healing wound on the tongue is worrisome . See an ENT doctor asap for biopsy to rule out cancer.

See a dentist: This may be dental in origin such as a sharp tooth or filling that is rubbing against your tongue, or it may be one of a number of medical conditions. Your dentist will know what it is and what to do. If not, he\she can refer you to a specialist if it is beyond their scope of treatment.