Let him lie on it, which will relieve the development of bedsore.
If you sit up, buy a bedsore pad (a bit like a swimming ring)
Turn over frequently and try not to press bedsores.
Change the medicine once a day
If it is dirty due to defecation, it should be cleaned and replaced in time.
Pay attention to the drugs you take, especially anti-inflammatory drugs.
See if there are any allergies.
Do they have ulcers in the side effects column?
If so, try taking another medicine.