Occasionally, the condition may resolve without treatment. Follow-up appointments are important to monitor hypothyroidism over time, however. If hypothyroidism doesn't go away on its own within several months, then treatment is necessary. If left untreated, this condition eventually may lead to serious health problems.

Can borderline thyroid be treated?

If you have an underactive thyroid, your doctor may prescribe you a hormone replacement medicine called levothyroxine (thyroxine). You take this once a day as a tablet. If you're over 65 or have heart disease, you'll start by taking a small amount of levothyroxine.

What if your thyroid is borderline?

The term “borderline hypothyroidism” typically is used when blood tests show that your body's level of TSH is slightly above normal, but your T3 and T4 levels are normal. Another name for this condition is subclinical hypothyroidism.