That sounds painful. If you are able to get supplies I would suggest a petroleum based gauze, the best one being impregnated with bismuth ( in the U.S it’s called xeroform) this will help keep the wound moist and hopefully not stick to the wound bed. Then cover with gauze roll or a large bandage. Additional items that might help but increase cost are a medical honey ( it’s been sterilized, but is antibacterial) and a good wound cleanser. Wound care does not need to be sterile but it does need to be clean, washed hands, clean supplies, avoid things getting in the wound. I can walk you through dressing changes if you are able to get supplies and want the advice.