What does tiredness in pregnancy feel like with underactive thyroid in pregnancy?

An underactive thyroid can slow body processes. Alongside low energy, you may notice feeling unusually cold, dry skin, constipation, muscle aches, a lower mood, or difficulty concentrating. Pregnancy itself can cause fatigue, so these signs do not identify a thyroid problem by themselves. A clinician usually considers your symptoms with thyroid hormone blood tests.

Tell your maternity or primary-care team when the change began and whether you are taking thyroid medicine. Keep blood-test appointments and take prescribed treatment consistently, following instructions about timing and other supplements. Do not alter the dose or stop treatment because energy changes; ask the prescriber to review the results and plan.

Contact a clinician promptly if tiredness is worsening, interferes with eating or moving, or occurs with fainting, chest pain, severe breathlessness, confusion, or a persistent racing heartbeat. Seek urgent maternity advice for heavy bleeding, severe abdominal pain, or any pregnancy concern that feels sudden or serious.

Ask which thyroid tests are needed, when results should be reviewed, and whether pregnancy has changed your medication plan. Ask how to separate thyroid treatment from iron or calcium supplements, and which symptoms should prompt an earlier appointment.