Multinodular Goiter: This is a common condition characterized by the enlargement of the thyroid gland, which can cause anterior neck swelling. It is often associated with a long-standing history of thyroid disease and can be detected by palpation and confirmed by ultrasound.

Thyroid Nodule or Cyst: Solitary thyroid nodules or cysts can cause localized swelling in the anterior neck. They are usually benign but require evaluation to rule out malignancy.
Lymphadenopathy: Enlargement of lymph nodes in the neck can be due to various causes, including infections, autoimmune diseases, or malignancies. The location and characteristics of the swelling can help differentiate it from other causes.
Thyroiditis: Inflammation of the thyroid gland, which can be caused by autoimmune diseases (e.g., Hashimoto's thyroiditis), infections, or other factors, leading to swelling and tenderness in the anterior neck.

Thyroid Cancer: Although less common, thyroid cancer can present as a swelling in the anterior neck. It is crucial to evaluate any new or growing neck mass to rule out malignancy.
Anaplastic Thyroid Cancer: A rare and aggressive form of thyroid cancer that can cause rapid enlargement of the neck and can be life-threatening if not promptly diagnosed and treated.
Retropharyngeal Abscess: A serious infection that can cause swelling in the neck and potentially lead to airway obstruction. It requires immediate medical attention.

Subacute Granulomatous Thyroiditis (de Quervain's Thyroiditis): A rare inflammatory condition of the thyroid gland, often following a viral infection, which can cause neck pain and swelling.
Teratoma or Dermoid Cyst: Rare congenital tumors that can occur in the neck and cause swelling.
Branchial Cleft Cyst: A congenital anomaly that can present as a lump or swelling in the anterior neck, often becoming apparent during childhood but can be diagnosed at any age.