A heart rate of 180 to 200 while sleeping is significantly above the expected range for a 4.5 year old child. Even in children, the normal sleeping heart rate should generally be between 70 and 110 beats per minute. If the pulse rate you are counting by hand is around 100, but you are hearing or sensing a "dhik dhik" or fast pounding sound, it could be due to strong cardiac awareness or episodes of paroxysmal tachycardia. Excessive sweating during sleep, especially if chronic over several years, is not typical and may point to an underlying autonomic or metabolic imbalance, or rarely, a congenital rhythm issue. The suggestion of mild asthma may explain exertional symptoms but does not fully account for persistent nighttime rapid heart activity.
Next Steps
You should request a 24 hour Holter monitor to document his heart rhythm during sleep and activity. A simple resting ECG may not catch intermittent episodes of fast rhythm. Also ask for an echocardiogram to rule out structural issues. If his pediatricians have not taken this seriously, please consider a pediatric cardiology consult. In homeopathy, if rhythm is persistently elevated without structural defect, constitutional remedies such as Phosphorus, Tuberculinum, or Lycopodium have been used in children with high metabolic drive, restlessness, and sympathetic overactivity. But this must follow a full case assessment and should not delay basic cardiac workup.
Health Tips
Ensure his room is cool and well ventilated during sleep. Give him light, early dinners free from
sugar and heavy fried food. A warm bath before bed and a gentle oil massage with coconut or sesame oil can help reduce sympathetic drive. Let him sleep on a cotton sheet without heavy blankets. Offer natural calming herbs like tulsi water or a few drops of Brahmi extract in honey if advised by your doctor. Track his heart rate during different situationsâsleep, play, and restâand keep a log for review.