Individuals with the common cold may consume moderate amounts of grapefruit, which is rich in water and contains various vitamins, helping to replenish essential nutrients. However, those with relatively weak spleen and stomach function or diarrhea should avoid excessive intake, as grapefruit is considered “cold” and “cooling” in nature; overconsumption may exacerbate gastrointestinal discomfort. If cold symptoms progressively worsen—such as developing high fever or coughing with wheezing—prompt medical attention is required for appropriate diagnosis and treatment.

During a cold, you may consume a small amount of leek and egg dumplings; however, leeks are pungent and should not be eaten in large quantities. Individuals with weak gastrointestinal function or those experiencing excessive coughing with copious phlegm are prone to abdominal distension and worsening throat discomfort if they consume too many leek-based foods. If a cold persists for an extended period—especially when accompanied by high fever and coughing with shortness of breath—prompt medical attention is essential for appropriate diagnosis and treatment.

Individuals with colds and coughs can consume tofu. Tofu has a soft texture, is rich in protein, and is easily digestible—thus unlikely to irritate the respiratory tract. However, cooking methods affect tolerance: dishes prepared with excessive oil or spice may exacerbate throat discomfort. If cough persists for several days without improvement—or is accompanied by fever or chest tightness—prompt medical evaluation is necessary to identify the underlying cause.

Smoking exacerbates upper respiratory tract infections. Harmful substances in tobacco damage the airway mucosa and impair the respiratory system’s defensive capacity, worsening symptoms such as coughing and sore throat, and prolonging recovery time. If the infection fails to improve over time—or if symptoms such as chest pain or high fever develop—prompt medical evaluation and treatment are essential.

During a cold, the body’s digestive capacity declines. Individuals with mild symptoms may consume small amounts of steamed sea cucumber with egg; however, sea cucumber should be avoided entirely during phases of high fever or gastrointestinal discomfort. Sea cucumber is rich in protein, and excessive intake may overburden the gastrointestinal tract and pose a risk of allergic reactions. If the cold persists without improvement—especially if accompanied by high fever, coughing, or wheezing—prompt medical consultation is essential for appropriate diagnosis and treatment.

Lianhua Qingwen Granules should not be taken if they are two months past their expiration date. After expiration, the active ingredients in the medication degrade, leading to reduced efficacy; additionally, chemical decomposition may occur, potentially causing gastrointestinal injury or worsening of symptoms upon ingestion. If vomiting or abdominal pain occurs after taking the medication, seek medical attention promptly.

Avoid consuming cockles during coughing episodes. As a high-protein seafood, cockles may trigger allergic reactions, exacerbating throat itching and phlegm production. In individuals with weakened digestive function, they may also increase gastrointestinal burden. If cough persists for an extended period, or if chest tightness and shortness of breath occur, seek medical attention promptly to determine the underlying cause.

Even after recovery from H1N1 influenza, reinfection remains possible. Antibodies generated following infection persist for only a limited duration, and the virus is prone to mutation. Lifelong immunity against H1N1 influenza does not develop in humans, making recurrent infections possible. Persistent high fever and difficulty breathing warrant prompt medical evaluation and symptomatic treatment.

It is not recommended to eat crab during a cold, as crab is a cold-natured, high-protein food that may exacerbate gastrointestinal burden and trigger allergic reactions in some individuals, thereby hindering recovery. Even in cases of mild cold with stable overall health, crab consumption should be minimized. If a cold is accompanied by persistent high fever, vomiting, or diarrhea, prompt medical attention and symptomatic treatment are essential.