1, drink more herbal tea and vegetables, don't eat too hot and spicy food, eat fried pig liver and other animal offal, (vitamin supplement)
2, eat more mung bean paste popsicles, you can take popsicles to the foaming place, eat more cooked and rotten.
3. No desire. Get enough sleep.
If it doesn't work and it doesn't get better in two or three days, go to the drugstore and buy some vitamin C silver wings to ease the fire.