Patients with heart disease must undergo lifestyle modification treatments before some specific treatments, which is a priority. What does improving lifestyle include? It includes appropriate exercise according to the patient's condition, a rational diet, a pleasant mental state, and adequate sleep, which are lifestyle practices adopted by all heart disease patients. A rational diet includes a certain amount of carbohydrates, a variety of fruits, vegetables, and more. As long as these are healthy dietary foods and the patient is not allergic and can tolerate them, they can be consumed. Can patients with rheumatic heart disease eat onions? Yes, they can. First of all, onions are just a type of food. As long as the patient does not have stomach diseases and can tolerate spicy foods, they can eat onions. Onions themselves do not have any special effects; they are simply a vegetable with a spicy taste. They might stimulate appetite, and when appetite is poor, using them may help increase it. Onions do not possess any special effects; they are merely a vegetable and can be consumed if tolerated.