hi. it is best if you consult with a doctor, preferably a general surgeon, for medical and physical examination. two things to consider primarily based from your description: 1. a possible cervical lymphadenopathy (inflamed lymph node) probably secondary to a recent upper respiratory tract infection 2. a possible lesion in your salivary or thyroid gland. clinical examination from your doctor will be of great help. further diagnostic examination such as neck ultrasound, ct-scan or x-ray and subsequent management (medical and/or surgical if indications are found) will be directed accordingly. hope this helps. good day!! ~dr.kaye