While having the flu, DO NOT drink cold or iced beverages. Do not consume lime or lemon. It is best to avoid eating uncooked and cold foods like salad, sushi, smoothies, and ice cream; greasy or deep fried foods like chips, fries, and cheese; and pungent or heavily seasoned foods like kimchi, curries, and barbeque. No shrimp and shellfish. Avoid chocolate. No smoking, alcohol, and coffee.
Wear clothing that covers the chest to protect the lungs. Wear long sleeves and long pants to cover the skin and protect the pores. Stay away from drafts and cold. Rest more and try to sleep from 11 pm to 7 am.