After parotid tumor surgery, if the patient has symptoms such as damp-heat plumpness (stomach distension and discomfort), vomiting and acid swallowing (swallowing the acid that rushes upward from the stomach to the oropharynx), diarrhea and dysentery, the patient can drink Huanglian to relieve the symptoms appropriately according to the doctor’s instruction. However, it is important to note that the effect of a single Chinese medicine is weak, and other medicines can be used together under the guidance of a traditional Chinese medicine practitioner in order to achieve the best therapeutic effect. Huanglian is bitter in flavor and cold in nature. It belongs to heart, spleen, stomach, liver, gallbladder and large intestine meridians. It has the effects of clearing heat and drying dampness (removing heat and drying dampness), diarrhea and detoxification (removing fire and toxicity from the body). Huanglian is mainly used in treating jaundice, high fever and dizziness, excessive fire in the heart, insomnia, palpitations (rapid heartbeat, often accompanied by panic), epistaxis (vomiting of blood and nosebleeds due to blood heat), redness of the eyes, toothache, thirst, carbuncle and furuncle (sores on the limbs or face, with a small shape and deep roots, hard as nails), and so on. It is used for clearing heat and fire in the upper burner, for eye bleed and mouth sores; it is used for clearing the stomach and stopping vomiting; it is used for cold-heat interlocks, damp-heat obstruction (the accumulation of dampness and heat to form stasis), and vomiting; it is used to stop vomiting and vomiting; it is used for the disharmony of the liver and stomach (the disharmony of the liver’s ascending and the stomach’s descending functions) and for vomiting and acid swallowing. It is recommended that patients under the guidance of a doctor to carry out regular treatment, strictly in accordance with the dosage and method of medication prescribed by the doctor, and timely and good review.