Thyroid nodule 4a is a grade under thyroid ultrasound, and thyroid nodule 4a is usually not self-healing. Thyroid nodules, although clinically more common, and combined with the size of the thyroid nodules, classification, etc., most do not need to be treated, observation can be, but if it has reached the level of 4a, there is already a possibility of malignancy, the need for further pathological examination and active treatment. 1. Thyroid nodule 4a, even if the ultrasound puncture biopsy, pathology examination for benign, but also can not be self-cured, so pay attention to the regulation of lifestyle, such as quitting smoking and alcohol, maintain a happy mood, pay attention to eat less spicy and stimulating food, to low iodine diet. 2. Thyroid nodule grade 4a, about 2%~10% about malignant possible, if ultrasonic puncture biopsy, pathological examination for malignant, in addition to pay attention to lifestyle regulation, it is recommended to immediately in the thyroid surgical treatment, after surgery, timely and regular medication, and regular re-examination of the thyroid function ultrasound and thyroid function. If you find thyroid nodules, it is recommended to go to a regular hospital in time and follow the doctor’s instructions for treatment.