Americans are being urged to avoid contact with squirrels after alarming photos surfaced online showing the animals with swollen faces, wart-like growths, and oozing sores. The images, widely shared on Reddit and Facebook, sparked concern among animal lovers.

One user posted a photo of a squirrel with a large mass on its face, asking, “Any ideas what is going on with this little fella?” The disturbing sight quickly drew hundreds of reactions and questions.

Experts have since identified the condition as squirrel pox, also known as squirrel fibromatosis. The virus causes tumor-like growths on the skin and is more common in wild squirrel populations than many people realize.

Wildlife biologist Shevenell Webb explained that while the condition looks frightening, it is a naturally occurring virus. “It will run its course in time,” Webb noted, emphasizing that the disease is part of the squirrel’s natural ecology.

Although squirrel pox is not usually fatal, severe infections can interfere with eating or movement, leaving affected animals weak or vulnerable to predators. This often explains why people encounter visibly sick squirrels in neighborhoods or backyards.

Experts stress that people should never try to capture or care for infected squirrels. Handling wildlife poses risks both for humans and for the animals, which can become further stressed or injured.

Instead, the best advice is to keep a safe distance. If sick squirrels are spotted frequently in a particular area, residents can contact local wildlife services for guidance.

While the images may be unsettling, experts remind the public that squirrel pox is a naturally occurring condition. Awareness and caution are key—observe from afar, but never intervene directly.