My grandmother is suffering from Stage 2 bed sores (inside her butt cheeks, right above her rectum). Her problem is that she sits in her recliner almost all day long. We get her to walk around and move as much as we can, but she's 92 years old so just a little bit of walking tires her out and she wants to sit again. I am looking at an alternating pressure mattress which seems to inflate and deflate at different times to move the pressure around while she sits. I'd love to hear your thoughts on this and any other pressure relief chairs/chair mattresses. Also interested in any alternative solutions. We're worried about these sores worsening and getting seriously infected... Thanks in advance!