Hello Can anyone explain the difference between a deep tissue injury and a pressure sore? My husband was in a nursing home for a week to give me a break. When I collected him the home's manager explained that husband had a grade 2 pressure sore on his heel. She said the sore had started the day before. I was advised to inform the DNs. After 7 days one of the nurses said the sore was a now deep tissue injury. My husband had a air mattress in the nursing home, as he does in our home. I have been keeping his heels off the mattress as advised. The sore now looks like a large blood blister, very dark but skin still in tact. Has any one got any experience of this? I wondered how likely it is to clear up without the skin breaking? I have another DN visit on Friday and they are going to redo the care plans. Any information or advice gratefully received.