Preparation
TSH (Thyroid Stimulating Hormone) is the single most sensitive first test for thyroid trouble — the pituitary's thermostat reading of how well your thyroid is performing. When the thyroid underperforms, TSH climbs; when it overperforms, TSH falls. One small value, enormous diagnostic reach.
It is the standard screening test for the symptoms Kerala brings to clinics daily — fatigue, weight change, hair fall, irregular periods, infertility and cholesterol that will not behave — and the routine monitor for anyone on thyroid medication, where it guides every dose adjustment.
The test is a single home draw, no fasting, any slot from 7 AM to 9 PM. If you take thyroxine, test before the morning dose. For a fuller picture, the Thyroid Profile-I adds T3 and T4 on the same draw. Reports are in your app, usually within a day.
Test before taking the morning dose — the pre-dose TSH is what tells your doctor whether the current dose is right.