Fever often occurs, and when it does, it may be accompanied by headache and nausea. The headache is usually accompanied by a fever, so you can apply ibuprofen to reduce the fever, and the headache can usually be relieved when the body temperature drops to normal. However, in some cases, the headache is more obvious than the fever, so you can also choose ibuprofen because it is a drug that can reduce fever and also relieve headache, so it is called antipyretic and anti-inflammatory drug. If nausea occurs, it is often accompanied by appetite suppression when the fever is high, and if this suppression is strong, nausea may occur, even leading to vomiting. Therefore, it is not necessary to treat this symptom specifically, but only to treat the cold and hydrate a lot. You should eat food that is easy to digest, at least if your appetite is acceptable. If the nausea is more pronounced, even with repeated vomiting, you can use some medication to protect the gastric mucosa, and you can hydrate and rehydrate intravenously.