Understanding Seromas

A seroma is a localized swelling that develops when clear, straw-colored fluid collects beneath the skin, most often seen along the chest, belly, withers or at surgical and injection sites.

 

In horses, seromas often occur after trauma, surgical procedures, injections or prolonged pressure on a particular area. While they may look similar to an abscess, seromas are not caused by infection and do not contain pus.

Seromas form when blood vessels and lymphatic vessels are damaged, allowing serum to leak into surrounding tissues.

 

A seroma typically appears as a soft, fluctuant swelling that may be mildly warm but is generally not painful to the touch. The overlying skin is usually intact and there are no systemic signs of illness such as fever or lethargy.

 

Many small seromas will resolve on their own with rest and monitoring. Larger or persistent seromas may require drainage. Anti-inflammatory medications may also be prescribed to reduce swelling and promote healing.

 

We are experienced in diagnosing and managing seromas to promote faster recovery and minimize complications. If your horse develops unexplained swelling, contact your vet promptly for an evaluation!