Subclinical hypothyroidism

What is subclinical hypothyroidism?

This is an entity when the TSH has just gone up above normal to usually less than 10miu/ml and the thyroid hormones are on the lower side of the normal range. You are unlikely to have symptoms of Hypothyroidism here, so this is called subclinical or boderline Hypothyroidism.

What are the causes?

The same causes that can cause hypothyroidism are responsible for subclinical hypothyroidism, this is actually a stage from normal to proper Hypothyroidism.

Do we need to treat this condition?

Usually this condition does not warrant treatment except in certain select situations like:

  • Children
  • Pregnant women
  • Women planning conception
  • Other intercurrent illness requiring hospitalisation
  • Before any surgical procedure
  • Women with menstrual problems.

What is the course?

If not started on treatment, then we can wait and observe the thyroid function again after 2-3 months. It can resolve on its own, persist as subclinical hypothyroidism or proceed to frank hypothyroidism.