<s>[INST] I have an 82 year old female that suffered a stroke 5 years ago. She recently (yesterday) developed an open would at on her bottom. what could I use to treat it? It is located in the top of her butt crack. (sorry don t know a better way to describe its location) [/INST] HI, thanks for using healthcare magicIt is possible that it is a bed sore especially if her movements are restricted due to her stroke.If this is the case then one of the main aspects of treatment would be to limit the amount of time she spends in particular positions. She should be turned at least every 2 hours while in bed. She should sit out of bed regularly.The bedding may have to be changed to those that exert less pressure.Dressings such as hydrocolloid and alginate dressing are helpful in bedsores.I hope this helps </s>