If you think it's an emergency, call 911.Possible poisoning or something swallowed? Call Poison Control at 1-800-222-1222.
Overview
Lymph nodes swell with infections and shrink over weeks.
Some lumps are cysts present from birth.
When to get medical care
Call 911Trouble breathing or swallowing.
Get care todayRed, hot, painful lump with fever.
See a doctor soonA lump lasting more than 2 to 4 weeks or growing.
Causes
Causes include infections, cysts, and rarely cancer.
OwieClear has pages on 2 conditions that can cause soft or firm lump on a baby's or child's neck. Each shows how soon to get care.
Common causes
- Neck lump in a baby or child (needs checking)See a doctor if it doesn't get better
Most neck lumps in kids are swollen glands from colds.
Less likely causes
- RhabdomyosarcomaOften needs care today
The most common soft tissue cancer in children.
What you can do at home
- Watch the size.
Medicines
Antibiotics if infected.
At the doctor
The provider will check.
Questions you may be asked
- Size
- Fever
The exam
A neck exam.
Tests
- Ultrasound
- Blood tests
Prevention
Track changes.
- Measure over time
Check your symptoms
Most symptoms have more than one possible cause. The symptom checker looks at all of your symptoms together, plus your age, and shows how soon to get care.
Sources
Last updated 2026-11-13.