Hypothyroidism (low thyroid) is a hormonal agent imbalance caused when the thyroid does not produce sufficient thyroid hormone. What are the Symptoms of Hypothyroid? If everyone is wearing short sleeves and you are using a jacket, you most likely have a hypothyroid issue. Still other signs are deep sluggish speech, loss of hair, cold hands and feet, constipation, pale thick skin, brittle nails, and swelling of the face and eyelids. The best ways to Know for Sure? You can ask your medical professional to carry out a thyroid test and/or conduct the following easy self-test in the house: