There is a bulge on the right side of the neck, the possible causes are enlarged lymph nodes, goiter, cervical fibroma and so on. 1. Enlarged lymph nodes: Lymph nodes in the neck area are irritated due to various reasons, which can cause reactive hyperplasia of cells as well as histiocytes in the lymph nodes, resulting in enlarged lymph nodes. 2. Nodule or lump on the right side of thyroid gland: a bulge on the right side of the neck may be a cyst of thyroid gland, thyroid tumor or malignant tumor, which leads to nodule or lump on the right side of the neck and manifests as a bulge. 3. Neck fibroma: a bulging bag on the right side of the neck may be a tumor caused by connective tissue lesions in the neck. It is characterized by the appearance of painless lumps under the skin of the neck, hard texture, smooth, poor mobility, no obvious pressure pain. The right side of the neck has a bulge in the tendon may also have other causes, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.