Bedsores, or pressure ulcers result from prolonged pressure on a area of skin.
There are different stages of bedsores (1, 2, 3, 4) and are based on how deep the ulcer is. If there is black areas, this is a sign of necrosis
and needs to be treated imminently. Depending on how deep it is, infection of the bone may happen (osteomyelitis
) which is very serious. Please have grandma examined by a doctor.
Answer assisted by Michael Erickson, Medical Student