A bulge in the middle of the neck needs to be considered as a benign subcutaneous mass, thyroid disease, enlarged lymph nodes and other diseases. 1. benign subcutaneous swelling: neck bulge may be benign subcutaneous swelling, such as acne, fibroma, lipoma and so on. 2. Thyroid disease: If a bulge appears under the front side of the neck, it may be a thyroid nodule, thyroid adenoma or even thyroid cancer. 3. Enlarged lymph nodes: If there is a bulge on the outer side of the neck, it may be enlarged lymph nodes, such as inflammatory enlargement of lymph nodes caused by laryngitis and tonsillitis, or malignant tumors in nasopharynx, which can also lead to metastasis of the tumor cells in the neck lymph nodes and result in enlarged lymph nodes. Neck bulge may also be caused by other reasons, once you find the neck bulge phenomenon, it is recommended to go to the regular hospital in a timely manner to find out the cause, and targeted treatment.