What this test is
When thyroid hormone levels fall, the pituitary releases more TSH; when they rise, TSH falls. The TSH value therefore indicates the direction of hyperthyroidism or hypothyroidism.
Category: Thyroid Function
TSH
TSH is a pituitary hormone that signals the thyroid gland to work. It is the first-line thyroid test when hormone levels are suspected to be too high or too low.
What it is used for, and who should test
- Screening with fatigue, weight change, palpitations, or feeling unusually cold or hot
- Monitoring treatment of hyperthyroidism or hypothyroidism, including thyroid hormone replacement
- Screening in pregnancy or before pregnancy when a doctor considers it appropriate
Sample and preparation
- Sample
- 2-3 mL of blood in a serum tube
- Preparation
- No fasting required. Test at a similar time on each occasion and mention thyroid hormone or biotin supplements.
Where to get tested
Samples are collected and results issued at S.F. Laboratory, the in-house laboratory of BK5 Med Health Clinic in Don Hua Lo, Chon Buri. No appointment is needed; walk in during opening hours.
- Sample collection at BK5 Clinic, 149/6-7 Don Hua Lo, Chon Buri District, Chon Buri 20000
- Open Monday-Friday 08.30-20.00 and Saturday 08.30-17.00
- Ask questions or book ahead on LINE @824xsgsj or call 063-223-6161
The information on this page is general knowledge to support your decisions and is not personal medical advice. Interpreting results and planning treatment requires assessment by a doctor. Please consult our medical staff before deciding on testing or treatment.
Need a pre-employment check or a medical certificate?
BK5 Clinic provides pre-employment health checks, risk-factor screening, 5-disease screening, work-at-height checks and drug screening, with medical certificates and summary reports for employers.
Thyroid Function
Frequently asked questions about this test
What does a high TSH mean?
It usually indicates an underactive thyroid, so Free T4 is checked to confirm. A doctor assesses symptoms and history before diagnosing.
How often is retesting needed on thyroid medication?
Doctors generally check TSH periodically after starting or adjusting the dose to keep values in the target range safely.
How should I prepare for TSH?
No fasting required. Test at a similar time on each occasion and mention thyroid hormone or biotin supplements.
How long do results take?
About 1 day, depending on the laboratory workload that day. Our staff will confirm the collection time when you are served.
Where can I have this test done?
Samples are collected and results issued at S.F. Laboratory, the in-house laboratory of BK5 Med Health Clinic in Don Hua Lo, Chon Buri. No appointment is needed; walk in during opening hours.
How much does TSH cost?
Prices are not shown on this website. Ask for pricing and packages on LINE @824xsgsj or call 063-223-6161.
Contact us
Book a visit or ask a question
Add us on LINE @824xsgsj to ask about tests and pricing, or fill in the form below and our team will get back to you as soon as possible.
Phone
063-223-6161LINE Official
@824xsgsj
Address
149/6-7 Don Hua Lo, Chon Buri District, Chon Buri 20000, Thailand
Get directions (Google Maps)Opening hours
- Monday - Friday
- 08.30 - 20.00
- Saturday
- 08.30 - 17.00