Would you know a pressure sore if you saw one? As a person spends more time just sitting in a chair or lying on a bed, unable (or forgetting) to move about, the prolonged pressure of the bones against fragile skin increases, cutting off blood supply and risking tissue death, ruptures, and infection. Watch for a reddening spot, especially in places where the bones are naturally close to the skin (such as ankles, hips, and back) or where skin rubs against skin (buttocks).
Be sure to rearrange the body every half hour if in a chair, or every two hours in a bed.
Gently move vulnerable limbs, and insert or rearrange pillows around the limbs to protect them from rubbing against each other or the sides of a chair or bed.
Keep skin clean and dry. A thin layer of petroleum jelly covered by gauze can help to protect an early-stage sore, but if there's open skin, alert a doctor.