Can a thyroid disease cause oily greasy hair?

Thyroid. An underactive thyroid can cause very dry skin and hair but an overactive thyroid can cause oily hair and very smooth skin. Other symptoms of an overactive thyroid include diarrhea, or frequent stooling, loss of hair, rapid heart rate and even irregular heart beat. Check with your doctor and if you have any other symptoms they could run a thyroid test to evaluate.

Related Questions