Children’s hand, foot and heart fever may be caused by Yin deficiency and internal heat, dampness and heat internal obstruction, etc. It is recommended to combine with the systemic symptoms to be clearly diagnosed by the doctor. 1. Yin deficiency and internal heat: this is a common cause of cardiac fever of the hands and feet. In children, yin deficiency leads to relative exuberance of yang qi, resulting in deficiency heat, and thus heart heat of the hands and feet occurs. At the same time, night sweats (abnormal sweating after falling asleep and stopping sweating after waking up), flushing of the cheekbones (redness of the cheekbones on both sides of the face), and dryness of the throat and tongue can also occur. 2. Dampness-heat internal obstruction: If there is dietary irregularity, weakness of the spleen and stomach, there may be dampness internal obstruction, and then depressed and transformed into heat (the evil qi stays for a long time and is transformed into heat), and there may be heat in the palms of the hands and the hearts of the feet. Accompanied by chest tightness and abdominal distension, not wanting to eat, heavy limbs, fatigue and other symptoms. If a small child is very hot in the palms and feet, it is recommended to ask the doctor for a clear diagnosis and standardized treatment under the doctor’s guidance.