Can hypERthyroidism cause chronic low grade fevers of about 98.7-99.6? And what else could it cause?

answered:

Likely U R right..

Thyroid
Excess thyroid hormone causing thyrotoxic crisis, AKA thyroid storm, can cause elevation of body temperature in excess of 104, so chronic hyperthyroidism is likely to elevate your body temperature a bit. Your body is basically revved up 24/7 thus producing extra heat, hence the temperature. Please consult doc to get treatment as untreated can cause problems for you. Good luck
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Body Thyroid gland Hormone Fever Hyperthyroidism Overactive thyroid

Not usually

Shortness_of_breath
Fever is not a usual symptom. Most often hyperthyroidism causes increased sweating, rapid heartbeat or palpitations, a tremor, the appearance of staring, loose stools, fatigue or shortness of breath with exercise, weight loss, and feelings of anxiety.
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Fever Exercise Difficulty breathing Increased sweating Losing weight Tremor Breathing Feces Palpitation Shakes