Can people with allergic constitutions drink milk when they have a cough?
Generally, if individuals with an allergic constitution are not allergic to milk, they can consume milk in moderation during episodes of coughing. However, if a patient has lactose intolerance or is allergic to milk proteins, they should not consume milk. Detailed explanations are as follows:

If a patient is not allergic to milk, they can consume it in moderation during episodes of allergic coughing. Milk contains abundant nutrients such as proteins, vitamins, and calcium. Drinking milk in moderation can help supply necessary nutrients, support enhanced immunity, and generally will not exacerbate the illness. However, excessive consumption is not recommended, as it may cause gas, leading to bloating, abdominal pain, and other discomforts.
However, if a patient has lactose intolerance or is allergic to milk proteins, they should avoid milk during coughing episodes. Doing so could worsen cough symptoms and trigger more severe allergic reactions, such as asthma attacks, which may interfere with the effectiveness of medical treatment.
Patients should maintain a balanced diet, consuming more foods rich in proteins, vitamins, and minerals, such as eggs, milk, vegetables, and fruits, in order to strengthen their constitution and improve immunity.