I am an 80 year old female, and have had very heavy hair until about 20 years ago. Gradually it has become thinner, but after a regimen of 60mg. of prednisone for 17 days begining last March, I am losing my hair in alarming amounts. Genetically, both my mother and grandmother had very thin hair when they passed about age 90. I recently had thyroid tests, they were normal. Could there be an underlaying health problem causing my excessive hair loss?