I have been told today by my hairstylist that my hair is thinning. This has come as a huge shock. I have always had thick and healthy hair. It has never been permed. I am 73 years old, and I have my hair coloured, professionally, every six weeks. I never apply heat to my hair, and it is blown dry, by my stylist once a week. I have no idea what has caused this. I am a type 2 diabetic, and also suffer from hypothyroidism. I do not drink, and eat very little. Can anyone offer advice, please?