ConditionLast reviewed: 07 Feb 2026

Hypothyroidism: Causes, Symptoms, and Thyroid Testing

Learn common hypothyroidism symptoms, red flags, thyroid profile testing, and treatment follow-up basics.

Key Takeaways

  • TSH and free T4 are key first-line tests.
  • Dose changes require repeat testing after several weeks.
  • Take thyroid medicine consistently for reliable control.

Red Flags: Seek Urgent Care

  • Seek urgent care for severe drowsiness, confusion, very slow pulse, low body temperature, or swelling with breathing difficulty.

What It Is#

Hypothyroidism means the thyroid gland does not make enough hormones for normal metabolism.

Causes And Risk Factors#

Autoimmune thyroiditis, thyroid surgery, radioactive iodine treatment, certain medicines, and iodine imbalance are common causes.

Symptoms#

Fatigue, weight gain, dry skin, constipation, hair fall, low mood, menstrual changes, and feeling cold are frequent complaints.

Red Flags#

Seek urgent care for severe drowsiness, confusion, very slow pulse, low body temperature, or swelling with breathing difficulty.

Diagnosis And Tests#

Doctors usually start with TSH and free T4. Some patients also need T3, thyroid antibodies, and ultrasound based on symptoms.

Treatment Overview#

Treatment is usually daily levothyroxine with dose adjustment after repeat tests. Tablets should be taken consistently and away from interfering supplements.

Lifestyle In India#

Use routine medicine timing, adequate protein intake, regular activity, and consistent sleep. Discuss supplement use before combining with thyroid medication.

Prevention And Follow-up#

Repeat thyroid tests 6 to 8 weeks after dose changes, then at clinician-advised intervals when stable.

Frequently Asked Questions

Can hypothyroidism be cured permanently?

Many causes need long-term treatment, but symptoms and lab values are usually controllable with proper dosing.

Should thyroid tablets be taken before food?

They are commonly advised on an empty stomach at a consistent time each day.

Editorial & Medical Review

Author

PingMeDoc Editorial Team

Clinical Content Desk

Medical Reviewer

Dr Balaji Krishnan

MBBS, MBA

Medical Reviewer

Last Reviewed

07 Feb 2026

Content updates follow editorial and clinical review workflow.

References

  1. 1. American Thyroid Association patient resources - American Thyroid Association (2024) Source
  2. 2. NHS: Underactive thyroid - NHS (2025) Source

Related Reading

Curated links

Next Steps

Book a Relevant Test

Start with a lab test that helps clinical evaluation.

Consult a Doctor

Discuss symptoms and report findings with a clinician.