Firstly, Chinese medicine believes that “external treatment is the method of internal treatment”, but unlike the method of internal treatment which requires accurate dialectic, sometimes there is curative effect if the general direction is well mastered, which is incomparable to the method of internal treatment; secondly, external medicine can be used with great toxicity and can be stopped as soon as there is discomfort, so the side effects can be easily controlled; thirdly, some tumor patients have difficulty in eating, so external treatment can play a good therapeutic role. Thirdly, some tumor patients have difficulty in eating, so topical treatment can play a very good therapeutic role; fourthly, topical drugs should be added with transdermal agents to enhance transdermal absorption; locally, the blood concentration of drugs is large and the effect is fast; fifthly, the topical site is not necessarily limited to the local lesion, but can work through other parts; sixthly, less material is used to save raw materials. The nasal cavity is a common drug delivery site for nasopharyngeal carcinoma, brain tumor and headache, etc. These diseases are often treated with clearing heat, dispersing wind, dispersing nodules and anti-cancer products, such as Hosin, Gecko, Phellodendron, Shi Shangbai, Chuanxiong, Peppermint, Qing Hanxia and Serpent Six Valley. However, nasal medication is used sparingly or without warm or hot medication, otherwise nasal burning sensation and nosebleeds will occur. It should also be pointed out that nasal administration for cancer pain is very effective, with fast onset, often 1-2 minutes for pain relief, but weak pain relief power, while western medicine has strong pain relief effect, but slow onset, often 20 minutes for onset, Chinese and western medicine for pain relief can complement each other, Chinese medicine for pain relief often starts to control at the beginning of the pain, and it is difficult to have big pain. Secondly, oral cavity can be treated with local medicine and fumigation for respiratory tract tumors. Radiotherapy and chemotherapy for head and neck tumors can cause oral lesions, and the effect of systemic treatment for oral lesions is not satisfactory, so the symptoms can be reduced by local treatment, such as oral ulcers, which can be treated with local application of Healing Heart oral liquid and ulcer oil, and at the same time, the efficacy of taking sealant is very good. For lung cancer, the effect of acupuncture point patch introduced by the world is not good. Referring to nebulized inhalation of modern medicine, decoction of dialectic plus anti-tumor Chinese medicine is inhaled into the respiratory tract through nebulization and then into the alveoli to produce therapeutic effect with satisfactory efficacy. Commonly used drugs: 15g of burnt dried toad, 20g of gecko powder, 10g of dried ginger, 6g of ephedra, 50g of sea fushi, 15g of bamboo rhizome, 10g of sedge, 10g of hedgehog shell, decoction while inhalation, high concentration of drugs in the alveoli, naturally the curative effect will be better. Third, the umbilicus (Shen Que point), a sacred point, treats many diseases, not only abdominopelvic diseases, but also thoracic diseases, neurological diseases, such as insomnia, pain, low blood count, vomiting, ascites, abdominopelvic tumors, intestinal obstruction, etc. Fourth, the anus, the liver is a common drug site for rectal cancer, sigmoid colon cancer, prostate cancer and constipation, such as Huachansuo tablets and bitter ginseng injection for anal administration of intestinal cancer, Xiaquanxu cream for anal administration of prostate cancer, and honey-conducted decoction for anal administration of constipation, etc., all of which have more ideal efficacy. Fifthly, local administration of medicine can be given to certain parts of the body, such as ulceration caused by extravasation of chemotherapy drugs or skin exudation caused by radiotherapy, so that astragalus 50g, safflower 50g, rhubarb 50g, comfrey 50g and angelica 50g can be used externally after 30 minutes of oil decoction. If the tumor recurs after radiotherapy, the topical tumor drugs can be combined with the ulcer treatment formula to make an oil for external use. 150g of sea fushi, 150g of gecko powder, 60g of raw rhubarb, 10g of cao wu, 90g of comfrey, 120g of raw astragalus, 90g of angelica, 120g of summer cucumber, 120g of mountain cigarette, 30g of tuyen, 150g of seaweed, 30g of seaweed, 120g of tuyen. 30g, 150g of seaweed, 30g of sizzling ephedra, 90g of bone marrow, 90g of cat’s claw, 30 centipedes, 90g of frankincense powder, 90g of cinnamon powder, 10g of ice chips, firstly, decoct the sea floating stone, gecko, raw rhubarb and grass wool in oil, after half an hour of decoction, remove the dregs and use the oil of the decoction to decoct comfrey, raw astragalus, angelica, summer cucumber, mountain cigarette, earth element, seaweed, sizzling ephedra, bone marrow, cat’s claw and centipedes. Centipede, decoction for half an hour and remove the dregs, after the oil is placed at normal temperature, add frankincense powder, cinnamon powder and ice chips, stir well, put it for seven days and then it can be used, usually applied locally for 4-6 hours and then wiped off, it can be used several times a day. For the treatment of numbness of hands and feet caused by platinum oxalate, use Astragalus and Cinnamomum Wu Wu Tang with Gynostemma, g Datura, Centipede and Dulcis, etc. Also use Chuan Wu, Cao Wu, Dulcis, Astragalus, Cinnamomum, Red Peony, Gynostemma, Bitter Ginseng and other drugs in water decoction for external washing. However, the treatment of numbness of hands and feet from paclitaxel and capecitabine is much more complicated, and it is necessary to consider dampness obstructing the ligaments, using Dilong 15, Cang Er Zi 12, Fang Ji 12, Slippery Rock 15, Gentiana 10, Silphium 10, Sericea 12, Huang Lian 10, Wei Ling Xian 30, Hai Feng Vine 20, Atractylodes 10, Job’s Tear 30, decocted in water for external washing, which has certain effect after 1 month of medication, but it is difficult to get results in the short term. Not all tumors are suitable for creams, thin people and superficial tumors are better to use oil or spray. If breast tumors recur and tumors still exist after chemotherapy is over, local external spraying drugs can be considered, meanwhile, local external spraying drugs are also considered for breast hyperplasia and breast fibroids, here we should emphasize that breast cancer is mostly caused by Qi stagnation, blood stagnation, phlegm blockage and heat, less warming drugs are used, otherwise it will stimulate tumor growth. I usually use Xia Ku Cao, Angelica, Lactuca, Shan Ci Gu, Lychee Kernel, Orange Kernel, Dandelion, Semen, Bile South Star, Gecko, Centipede, Cinnamon, Shan Nai, etc. to decoct and spray externally.