In hot weather, I study reading and writing in my room, and there is no fan or air conditioner, so I am very hot.

Your symptoms have no obvious specificity. Considering that it is related to heatstroke, hypoglycemia, hypotension and anemia. It is suggested to drink plenty of water, exercise properly to enhance physical fitness, eat more fruits and vegetables to supplement vitamins and trace elements, eat more high-protein foods to supplement nutrition, and eat red dates and longan in moderation to replenish blood and qi.