Infant hand swelling: what parents should know

Swelling may follow a knock, crush injury, insect bite, skin irritation or infection. A fracture near the wrist can also cause hand or finger swelling, even when the wrist itself is not obviously bent. Less commonly, an inflammatory condition can affect several joints, but infants need an individual examination rather than a label based on appearance.

Compare both hands for colour, warmth, movement and size. Note when the swelling started, whether it is spreading, and whether the child is feeding and behaving normally. A clinician may ask about fever, new products, bites and any unwitnessed injury.

Remove anything tight from the hand or wrist, such as a band, thread or jewellery, if it can be taken off without pulling swollen skin. Keep the hand comfortably supported and avoid squeezing, massaging or forcing the fingers to move. Do not apply medication or a tight wrap unless a clinician has advised it.

Arrange medical advice promptly if swelling does not settle, follows a fall, or makes the infant use the hand less. A clinician may assess for Distal Radius Fracture or another injury. Take a photograph only to compare change; it should not delay care.

Seek emergency help if the fingers or hand become blue, pale, cold or very tense, if the infant cannot move them, or if swelling is rapidly increasing. Urgent assessment is also needed for severe pain, an open wound, a deformity, fever with a hot red hand, or an infant who is unusually sleepy or difficult to settle.

If swelling affects more than one joint, keeps returning, or comes with prolonged morning stiffness, arrange a paediatric review. Conditions such as Rheumatoid Arthritis are uncommon in infants but require specialist assessment when the pattern raises concern; do not diagnose from swelling alone.

Ask what may be causing the swelling, whether an X-ray or other test is needed, and how to protect the hand while waiting. Ask which changes in colour, temperature, movement or behaviour require emergency care, and when the infant can use the hand normally again.