How do you prevent someone who's paralyzed from getting bed sores?

I have an identical twin sister who became paralyzed from the neck down not that long ago. She's helpless and we have to change her diapers and tube feed her and suction her lungs, etc...We're 17 and I take care of her a lot. My mother and I noticed she's getting a type of red sore on her upper thigh. Does anyone who's knowledgeable know how you properly treat a bed sore and prevent further sores and diaper rashes?How do you prevent someone who's paralyzed from getting bed sores?
Bed sores are due to continous pressure in that area. So,keep changing the positions.If bed sores are secondarily infected then treat with antibiotics.How do you prevent someone who's paralyzed from getting bed sores?
To prevent bed sores, you have to move and rotate her daily, so she's not constantly laying in the same position. Ask your doctor about some creams that you could use for treating the sores, and the diaper rash. good luck.
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