Drink a cup of black tea in the morning to make ginger water fresh. Put 5 or 6 slices of fresh ginger in a bag of black tea and have breakfast later. Only drink porridge. Lunch and dinner are very light. No breakfast the next day. Only drink black tea water. If it is too spicy, put some honey. Drink black tea for breakfast and dinner in the future. Return to normal diet on the fifth day. It's not much.