Some patients do not come to see the doctor after taking Chinese medicine for a few days, thinking that they can stop seeing the doctor if they have no symptoms, which is a big mistake. How long does it take to heal? At present, there is no definite figure. Most of the old Chinese medicine practitioners believe that those who do not have tumor lesions should take one dose of medicine every day for the first two years, one dose every other day for the third year, one dose for three days for the fourth year, and one dose every week for the fifth year, so that the effect will be better. The reduction of tumor recurrence and metastasis is not only a matter of tumor suppression, but also a matter of changing the constitution of tumor patients. If patients have tumor lesions, they should insist on long-term medication until the tumor disappears for 2 years before stopping the medication. Many patients will ask, how long is it reasonable to change the prescription? I think, if the disease is acute, the condition of a daily change, up to 7 days, more stable 2 weeks to change; foreign patients can not exceed the longest 2 months, why? Chinese medicine believes that about 2 months a main gas, each main gas treatment are different, the treatment of drugs need to change, so it is best to see the doctor often.