causes of swelling in the neck
Other causes of neck swelling. Neck swelling can also be caused by a variety of other conditions including: 1  General infection leading to swollen lymph nodes. 2  Goiter (an enlarged thyroid gland).
In some cases, neck swelling may be a symptom of a serious or life-threatening condition that should be immediately evaluated in an emergency setting. These include: 1  Anaphylaxis (severe allergic reaction). 2  Angioedema (a severe swelling beneath the skin that can cause breathing difficulty).