Is TSH Schilddrüse useful for Schlaf?

TSH (thyroid-stimulating hormone) is a standard marker for thyroid function. Thyroid dysfunction—both hyper- and hypothyroidism—can affect sleep: hyperthyroidism often causes insomnia and restlessness, while hypothyroidism leads to fatigue and excessive sleepiness. However, TSH alone is not a specific 'sleep test.' For sleep issues, general sleep hygiene, stress, and possible sleep apnea should be evaluated first. TSH testing is useful if additional symptoms like weight changes, palpitations, or cold intolerance are present. The evidence for routine TSH screening in sleep disorders without other signs is moderate. The test is medically established but not a magic bullet for sleep problems. Caveat: a normal TSH does not rule out other causes of poor sleep.