Camphor is toxic. The efficacy and function of camphor is to remove dampness and kill insects, warm dispersal and relieve pain, open the orifices and dispel obscenity; contraindication is gas deficiency and pregnant women are forbidden to take. Camphor, the main treatment of chagasia (feel the seasonal improper gas or filth evil poison and dietary uncleanness caused by a seasonal disease) abdominal pain, vomiting and diarrhea, dizziness, scabies, itching, sores, wet rot, cold and damp feet (cold and dampness caused by numbness, soreness and swelling of the legs and feet), toothache, bruises, etc.; as well as Western medicine diagnosed as acute gastroenteritis, food poisoning evidence of dampness in the obstruction, and so on. It should be noted that excessive internal use is not recommended, and is contraindicated in cases of qi deficiency and pregnant women. People with skin allergy should be cautious. If you need to use camphor, must be used under the guidance of a professional doctor.