You should be physically weak or qi-deficient. Qi deficiency is because the body consumes too much gas and cannot replenish it in time, which leads to qi deficiency. Qi deficiency usually manifests as qi deficiency, palpitation, shortness of breath and fatigue. Qi can be divided into three types, namely primordial qi, ancestral qi and defensive qi. Qi is the yang in the body, which is transformed from kidney essence. Zongqi is the qi produced by eating whole grains every day. Defending qi is vital qi to resist external evil. Three qi are indispensable. I suggest you go to the local Chinese medicine hospital.