My sister-in-law is Paralyzed since five years.Recently she got a sever bed sores at her bottom back.We are doing dressing it on daily basis but due to its location it get excoriated when she sit on wheel chair.I searched on Internet and found that it seems a stage 3 or 4 bed sore that can we treated with surgery.Some people advised that it can be cured only with Plastic Surgery.So Please advise the best way to heal it ASAP because this bedsore affecting her exercise and daily work.