There are many causes for swelling in the neck, most common being
thyroid swelling which is known as goitre. There are many causes for thyroid gland to enlarge such as Benign nodule, hypothyroidism, hyperthyroidism, benign tumor etc. You may need to undergo ultrasound of neck, thyroid function tests, fine needle aspiration cytology of the swelling
Next Steps
Consult nearby ENT specialist or general surgeon for more confirmation of diagnosis and appropriate treatment if required