Weight loss after half a year of radiotherapy for tonsil cancer is often a normal situation, which can be regulated by life style, in addition, it is necessary to actively treat the primary disease. 1. Lifestyle regulation: Radiotherapy for tonsil cancer will have certain side effects on the body, and the appetite of patients will be affected, so weight loss should be regulated in life, and try to eat more nutritious food in diet, such as eggs, soybean products, milk, meat, etc. In addition, eat more fresh vegetables and fruits to supplement vitamins. Also eat more fresh vegetables and fruits to replenish vitamins. It is also recommended to go outdoors more often to do exercise to improve appetite. 2. Treat the primary disease: you should also treat the primary disease, cancer itself is a consumptive disease, the tumor is controlled, which can help to restore weight, and you should follow the doctor’s prescription to treat tonsil cancer correctly. It is recommended to relax, actively cooperate with doctor’s treatment and have confidence in overcoming the disease.