It is not true that playing cell phone before going to bed is prone to thyroid cancer, and clinically there is no such thing as playing cell phone before going to bed is prone to thyroid cancer.
Thyroid cancer is a malignant tumor originating from the follicular epithelium or parafollicular epithelium of the thyroid gland, and is the most common malignant tumor of the head and neck. Thyroid cancer is usually associated with radiation exposure, high or low iodine intake, and hormonal disorders.
Although ionizing radiation is a clear causative factor of thyroid cancer, the amount of ionizing radiation caused by cell phones is far less than the amount of disease-causing radiation, so clinically there is no such thing as playing cell phones before going to bed is prone to thyroid cancer.
In addition, playing the cell phone before going to bed also has adverse effects on the body, should try to play less cell phone before going to bed.