Ectetinib is a selective EGFR tyrosine kinase inhibitor, its side effects are mainly manifested as follows: 1, cardiovascular system, pericardial effusion, palpitations, hypotension. 2, metabolic and endocrine system, hyponatremia, elevated blood glucose. 3, respiratory system, cough, rhinorrhea, dyspnea, hemoptysis, lung infection, etc. 4, genitourinary system, proteinuria, elevated urinary leukocytes, elevated urea nitrogen, Immune system, allergic reactions. 6. Nervous system, dizziness, headache, drowsiness, etc. 7. Gastrointestinal system, diarrhea, nausea, vomiting, decreased appetite, dry stools, gastric ulcer, vomiting blood, etc. 8. Blood system, leukopenia, decreased hemoglobin, thrombocytopenia, etc. 9. Skin system, rash, nail lesions (including nail infection), itching, dryness, peeling skin, hand and foot syndrome, etc. 10, Other manifestations include eye pain, chest discomfort, fatigue, fever, lower limb edema, etc.