Yes, I have an underactive thyroid. The symptoms are many and varied, feeling cold, putting on/ inability to lose weight, having trouble remembering things or being slow, dry skin, brittle hair, muscle and joint aches to name but a few. You can suffer from a lot of theseor a few. A trip to the doctor who will do a blood test to co firm. I have annual blood tests to keep an eye on levels. I take Levothyroxine at bedtime. Thyroid problems can run in families with women affected more than men.