Cystic solid thyroid nodules are generally considered to be mostly benign and relatively less dangerous. Thyroid nodules generally refer to masses in the thyroid tissue that can move up and down with swallowing after abnormal proliferation of thyroid cells, and can be benign or malignant. Cystic solid thyroid nodules are generally defined as a type of thyroid nodule in which the patient is found to have both fluid dark areas and substantial changes in the thyroid nodule by ultrasonography. Cystic solid thyroid nodules are more likely to be benign and are generally considered to be less dangerous. However, a small percentage of cystic solid nodules may be malignant, so a higher risk cannot be ruled out. If you suspect cystic solid thyroid nodules, you should go to a regular medical institution and actively cooperate with the relevant diagnosis and treatment to avoid delaying your condition.