11 Endocrine Disorder Symptoms You Should Not Ignore

4. Heart palpitations, hand tremors, and heat intolerance

Noticeable tremors, a racing heart, or a new intolerance to heat often point to an overactive thyroid. People describe this as their hands shaking when holding a cup, feeling suddenly warm in a crowded train, or experiencing brief bursts of rapid heartbeat even while seated. These symptoms come from hormones that overstimulate the nervous system and speed up metabolism. Anxiety and caffeine can mimic some of these signs, so track when symptoms happen—after spicy food, a cup of chai, or during rest. If palpitations are accompanied by unexplained weight loss, sweating, or difficulty sleeping, a thyroid evaluation is wise. Your clinician may measure TSH and free T4, check heart rhythm with an ECG if palpitations are frequent, and recommend beta-blockers for short-term symptom relief. Urgent evaluation is needed if palpitations come with chest pain, fainting, or severe shortness of breath. Otherwise, timely testing and treatment often control symptoms and prevent complications like atrial fibrillation.