There is no such thing as which one is serious, thyroid adenoma or thyroid nodule. Both diseases may develop into malignancy, produce pressure symptoms, etc., so you should seek medical attention promptly. Thyroid adenomas and thyroid nodules can lead to malignant lesions, so when suffering from both diseases, it is important to go to the hospital outpatient clinic for regular follow-up, and if there is a possibility of malignancy, it is necessary to do thyroid ultrasound, thyroid pathology and other tests to confirm the diagnosis. Thyroid adenomas and thyroid nodules may produce compression symptoms if they gradually increase in size, and patients may experience difficulty in swallowing and shortness of breath. Thyroid adenomas and thyroid nodules can be treated with surgery. When suffering from thyroid adenoma and thyroid nodule, you should go to the hospital for timely consultation and regular follow-up. It is recommended to take standardized treatment under the guidance of professional doctors.