Lung adenocarcinoma chemotherapy may cause hair loss after 1 to 3 times, which is related to the patient’s condition, the size of side effects of drugs and other factors. Lung adenocarcinoma patients can have chemotherapy before or after operation, through which the cancer cells inside and outside the lungs can be killed. Hair loss is one of the side effects after chemotherapy for lung adenocarcinoma. Due to different drugs chosen by patients, most of them may lose their hair after one to three times of chemotherapy. If patients with lung adenocarcinoma choose drugs such as paclitaxel, the side effects of these drugs will be a little bit bigger, and patients may have hair loss after 1 time of chemotherapy. If patients use drugs such as gemcitabine, the side effects are a little smaller compared to others, and patients may lose their hair 2~3 times after using chemotherapy. Usually the symptom of hair loss will improve after the patient stops the drug. Lung adenocarcinoma patients should keep positive and happy mood during chemotherapy, and exercise appropriately within the body’s acceptance range to enhance body immunity, and take medication under doctor’s guidance.