When the old man walks at the age of 80, he will suddenly feel weak in his calf, but he will get well soon. What happened? Besides, the old man has been coughing.

Analysis of illness: this situation of the elderly may be due to calcium deficiency and potassium deficiency. As for cough, it may be caused by respiratory infection or allergic reaction to certain substances.

Suggestion: It is suggested that the elderly should take calcium tablets, potassium chloride sustained-release tablets, kebiqing, montelukast and azithromycin for active treatment.