3. Dry skin
When thyroid hormones are low, blood circulation is decreased. In advanced cases of underactive thyroid, the skin may receive as little as one-third to one-fourth the normal blood supply.
Hypothyroidism can also lead to dry itchy skin, dry fizzy hair, itchy flaky scalp, brittle nails, dry cracked heels, loss of the outer third of eyebrows, falling of eyelashes and chronic eczema.
4. Weight gain
Hypothyroidism also leads to obesity and weight gain. Patients with an underactive thyroid tend to have a very low basal metabolic rate (BMR) .
One of the most common and noticeable symptoms of hypothyroidism is obesity, being overweight, and difficulty in losing extra weight. Sometimes hyperthyroidism can also mimic an underactive thyroid by causing weight gain, although this is very rare.
Some people especially women with hypothyroidism don’t gain much weight due to biochemistry of their body, the quality and quantity of the calories they consume, and how they consume those calories.