Dear madam , You don't have to be worried about it at all. While giving bath please massage the head with your hand in rotatory movements .( if elderly people are there at home you can ask them how to give massage to the head , they will guide u correctly to massage before bath with oil ) Don't worry about the hair ....it's because she is always lieing in that position .What u can do is change the head position inbetween her sleep 2 or 3 times... Dr Sujit.