The side effects of docetaxel chemotherapy include allergic reactions, various types of neurological diseases, skin and subcutaneous tissue diseases, systemic diseases and various reactions at the site of drug administration. 1. Allergic reaction: It mostly occurs in the first few minutes when the drug is first administered, and usually manifests as mild to moderate allergic reaction, in which the patient may experience facial flushing, sometimes accompanied by itchy rash, chest tightness, dyspnea, fever, chills, and so on. 2. Various neurological disorders: for example, patients may experience mild to moderate sensory symptoms such as sensory abnormalities, dysesthesia, burning pain, etc. Motor nerve events are mainly characterized by weakness. 3. Diseases of the skin and subcutaneous tissues: for example, mild to moderate reversible skin reactions, patients may have rashes on the hands, feet, buttocks, chest and other parts of the body, often accompanied by itching. 4. Systemic diseases and various reactions at the site of drug administration: generally occurring at the injection site, patients may experience mild hyperpigmentation, inflammation, redness or dryness of the skin, phlebitis or oozing and swelling. Docetaxel is commonly used in the clinic for the chemotherapy of locally advanced or metastatic breast cancer, non-small cell lung cancer, etc. However, it cannot be used by patients who are allergic to the drug, pregnant women, and patients with serious impairment of liver function. It is recommended to use Docetaxel under the guidance of professional doctors, and if serious side effects occur, the drug should be stopped immediately and consult a professional doctor or clinical pharmacist.