Treat air under the skin (ruptured air sac) - We love corvids (rooks, crows, jackdaws, magpies, ravens)

Guide	Treat air under the skin (ruptured air sac)
Target group	corvids and other birds
Author	H. – helpthecrows@gmail.com
Version	2026-07-19

Updated: 2026-07-19

When a bird suddenly looks bloated, it can sometimes be because air has gotten under the skin. This is called subcutaneous emphysema. In birds, it is often due to an injury in an air sac, in the lung or in the trachea, so that air leaks out into the tissue instead of staying in the respiratory system.

Important: A bird with respiratory distress, open-beak breathing, bluish mucous membranes, weakness, ongoing bleeding or a suspected predator bite should be seen as an emergency. Stabilization, heat, oxygen and veterinarian or experienced wildlife rehabilitator are more important than quickly trying to treat the swelling itself.

Bird with air under the skin in case of suspected air sac problem — Example of air under the skin. The swelling may feel soft, tense or balloon-like.

Video example: air that has collected under the skin.

Cause

Birds have a different respiratory system than mammals. The lungs are relatively solid and the air sacs help move air through the body. In the event of trauma, such as a collision, fall, predator attack, crushing injury or rough handling, an air sac or airway can rupture. Then air can be pumped out from under the skin every time the bird breathes.

More rarely, gas under the skin can be due to infection with gas-forming bacteria. It is a different and more dangerous situation, especially if the skin is discolored, hot, sore, smelly, or if the bird appears very ill.

Symptoms

A soft, tense or balloon-like swelling under the skin.
Swelling on the neck, chest, abdomen, under the wing or around the shoulder.
The swelling may move or come back after it is pushed away.
The bird may look fat or bloated, sometimes without appearing to be in pain.
In more severe cases: more difficult breathing, difficulty swallowing, poor appetite, stillness or rapid deterioration.

Assessment

It’s important not to be too quick to assume that anything that looks inflated is air. A filled demand, edema, bleeding, abscess, tumor, egg problem or internal trauma can sometimes give a similar impression. X-rays can show large air-filled areas under the skin and help assess if there are fractures, chest injuries, or other problems.

If the swelling is indeed air, it often feels soft, springy and not very painful. But the underlying cause can still be serious, especially after a predator bite, collision or other injury.

First aid

Put the bird warm, dark and quiet. Minimize handling.
Never press around the chest. Birds must be able to move their thorax freely to breathe.
Do not force-feed food or liquid if the bird has breathing problems.
Contact a veterinarian or experienced wildlife rehabilitator, especially if the swelling increases, recurs or affects breathing/movement.
If you have access to oxygen and know how it is used for birds: stabilize with oxygen before unnecessary handling.

Treatment

Small, stable air pockets can sometimes heal when the damage to the air sac closes on its own. Then calmness, warmth, stress reduction and careful observation may be the right way. This only applies if the bird is breathing normally, is alert enough, the swelling is not growing and there is no suspicion of a bite, infection or other trauma that requires treatment.

If the air accumulation is large, tense, increases, returns or interferes with breathing, swallowing or movement, the literature usually describes sterile emptying with needle/cannula as a first-line measure. It must be done aseptically by a veterinarian or a person with practical experience. One punctures the air-filled part, releases or aspirates the air and observes whether it fills again.

It is not unusual for the air to return in the first few days. Repeated sterile emptying may then be necessary. In chronic or recurrent cases, there are reports that a small temporary stent/cannula can maintain a controlled opening until the underlying injury heals. In severe chronic cases, surgical repair of a ruptured air sac may be necessary.

Antibiotics are not automatically the solution to the air itself, but can be important in the case of bites, wounds, infection, surgery or when the vet judges that the risk of secondary infection is high. Pain relief, anti-inflammatory treatment, fluids, nutritional support and treatment of other injuries are governed by the general condition of the bird.

About massage

Massaging or pushing out the air can sometimes temporarily move the swelling, but it doesn’t treat the cause and doesn’t create a safe path for the air to escape. It can also stress the bird and risk pressure on the chest. If air needs to be evacuated, a controlled, sterile puncture/emptying is a more logical and documented method than massage as a sole treatment.

When it’s urgent

The bird breathes with its beak open, wags its tail clearly when breathing or appears to panic.
The swelling increases rapidly or is present so that it affects the throat, throat, wings or breathing.
The bird is cold, weak, apathetic, sits on the bottom or cannot keep its balance.
There are wounds, predator bites, bleeding, suspected fractures or severe bruising.
The skin is discolored, warm, smelly, or there are signs of infection.

Prognosis

The prognosis is often good when the bird is stable, the damage is minor and the air does not return. The prognosis becomes more uncertain if there is extensive trauma, predator bites, infection, respiratory effects or if the air fills up again despite repeated emptying.