Stains and small burns can be cleaned from most Berbers and cut-pile carpets. Try to clean up spills as quickly as possible. To remove stains that have already dried, spray with a commercially available carpet cleaner and allow it to soak in for a few minutes. Then blot up the liquid. If your carpet has sustained small burns, trim them off with small scissors.
Larger burns require more attention.
You may need a professional to repair Berber carpets because the fibers are looped together. But you may be able to repair damage to cut-pile carpet by yourself. Draw the knife between the fibers so that only the carpet backing is cut. Use the cutout as template to cut a patch from a carpet remnant or from a closet area where the carpet is not often seen. Apply glue to the edges of the carpet to prevent the fibers from pulling out.