Feeling like your heart is racing when your rate is normal

Palpitations describe awareness of the heartbeat, not only a rapid pulse. Stress, panic, poor sleep, caffeine, nicotine, fever, dehydration, or low blood sugar can make each beat more noticeable. Anaemia and iron deficiency anaemia may leave the heart working harder to deliver oxygen. Hyperthyroidism can cause tremor, heat intolerance, and pounding beats. An irregular rhythm such as atrial fibrillation may come and go, so a single normal pulse check may not capture it. Heart failure is more often associated with breathlessness, swelling, or reduced exercise tolerance.

Stop strenuous activity while the sensation is present and sit somewhere calm. Breathe slowly, drink water if you may be dehydrated, and avoid stimulants until you understand the pattern. Record when it starts, how long it lasts, what you were doing, and whether the beat feels irregular. If episodes recur, arrange a clinical review; an examination, blood tests, or a wearable rhythm recording may be considered.

Seek emergency help for palpitations with chest pressure, severe breathlessness, fainting, new confusion, or collapse. Obtain urgent advice if the sensation is sustained, the pulse becomes clearly irregular, or you have known heart disease. Do not drive yourself if you feel faint or severely unwell.

Ask whether your medicines, thyroid function, blood count, hydration, or glucose could be contributing. Share pulse readings, triggers, family history of rhythm problems, and any chest symptoms, dizziness, breathlessness, or ankle swelling.