Brief Answer: Please refer to the following answers... Detailed Answer: Hi, The golf size lump you felt in the side of your neck has not come out as quickly as within a night. Perhaps you: - have been noticing that for some time - have had any flu-like or common cold syndrome recently To my opinion, the lump you are having would be related to: - infection of the saliva glands - possible calculus in the saliva glands - any throat or ear infection - possible teeth root infection So, I'd suggest to consult an ENT specialist for further evaluation and proper treatment. You might need to take: - oral antibiotic - anti-inflammatory drugs (e.g. paracetamol, ibuprofen,etc) - take good oral hygiene All the best! Dr.Alba Feel free to ask me again if you have further questions!