What Is Considered a Dangerously High TSH Level?
TSH levels are graded by severity.
TSH Severity Scale
- 4.0–10.0: Mild (subclinical)
- 10.0–20.0: Overt — treatment recommended
- 20.0–50.0: Significant
- Above 50.0: Severe
- Above 100: Critical — myxedema coma emergency
Symptoms of Severe Hypothyroidism
- Severe fatigue
- Hypothermia
- Bradycardia
- Confusion
- Puffy face and hands
- Dry thickened skin
- Hoarse voice
When to Seek Urgent Care
- TSH above 50 with confusion
- TSH above 100 regardless of symptoms
- Hypothermia with slow heart rate
Source: American Thyroid Association, NLM MedlinePlus.
Ratings summarize government-reported measures — they don't capture your personal needs. Visit the facility, ask about staffing and services, and use CMS checklists. This profile is informational only and is not a recommendation.
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