A possum bite typically leaves a pattern of small, closely spaced puncture wounds, often with two distinct rows from the upper and lower jaw. Because possums have 50 teeth (more than any other North American land mammal), their bite marks tend to look different from the clean two-fang punctures you’d see from a cat or the tearing wounds from a dog. The result is a cluster of tiny holes, sometimes accompanied by shallow scraping from their numerous small incisors.
The Bite Pattern Up Close
The Virginia opossum has five upper incisors and four lower incisors on each side of its jaw, along with prominent canine teeth. That adds up to 50 teeth total, packed into a relatively small mouth. When an opossum bites, the wound often shows a semicircular arrangement of small puncture marks rather than one or two deep holes. The canine teeth can leave slightly deeper, more noticeable punctures at the corners of the bite, while the rows of tiny incisors create a series of shallow pinpricks between them.
In practice, the severity depends on how hard the animal bites. A defensive nip from a cornered opossum may barely break the skin, leaving red dots that look almost like a scrape. A more forceful bite can produce deeper punctures that bleed freely, particularly from the canine teeth. The surrounding skin usually swells and reddens within the first hour. On fingers or hands (the most common bite location during encounters), the wound can look surprisingly messy because the skin is thin and the teeth are so closely packed.
Possum Bites vs. Other Animal Bites
Cat bites leave deep, narrow puncture wounds from their two prominent fangs, and dog bites tend to cause tearing or crushing injuries. A possum bite falls somewhere in between: multiple punctures of varying depth, clustered together. If you’re unsure what bit you, the telltale sign of a possum bite is the sheer number of small tooth marks. No other common backyard animal leaves that many individual punctures in such a tight grouping.
Australian brushtail possums, which are a completely different species from American opossums, have fewer teeth and a different jaw structure. Their bites tend to be less complex, though scratches from their claws are actually the more common injury in Australia.
What Happens as It Heals
A minor possum bite can heal in as little as 7 days. Deeper bites, especially those that become infected, can take several months to fully close. In the first 24 to 48 hours, expect some redness and swelling around the puncture sites. A small amount of redness at the wound edges is normal and part of the healing process. The punctures typically scab over within a few days, and the surrounding bruising (if any) fades from purple to yellow over about a week.
What you don’t want to see is the wound getting worse after the first couple of days instead of better. That’s the dividing line between normal healing and a developing infection.
Infection Warning Signs
Possum bites carry a real infection risk. Their saliva can harbor bacteria including one called Pasteurella multocida, which is more commonly associated with cat and dog bites but has been documented in opossum bite wounds. In rare cases, opossum bites have been linked to leptospirosis, tularemia, and other serious infections.
Watch for these changes in the days after a bite:
- Spreading redness that extends well beyond the wound edges, especially red streaks traveling up the limb
- Increasing pain after the first day rather than gradually improving
- Pus or cloudy drainage from the puncture sites
- Blisters forming around the bite wound
- Fever, chills, or body aches developing in the hours or days following the bite
- Swelling that keeps growing rather than plateauing
An infected bite wound looks noticeably different from a healing one. The redness becomes angrier and more widespread, the skin feels hot to the touch, and the punctures may ooze rather than scab cleanly. Pasteurella infections in particular can progress quickly, sometimes within 24 hours of the bite.
Immediate Wound Care
The single most important thing you can do with a possum bite is flush it thoroughly with clean water. Hospital protocols call for irrigating animal bites with at least 250 mL of saline under pressure, which is roughly a cup of fluid pushed forcefully into the wound. At home, you can approximate this by holding the wound under running water for several minutes, letting the stream flow directly into the punctures. The goal is to physically wash bacteria out of the tissue before they can establish an infection.
Puncture wounds are particularly tricky because they push bacteria deep into the skin but leave only a tiny opening at the surface. This creates a warm, closed environment where bacteria thrive. That’s why possum bites carry a higher infection risk than a scrape or shallow cut of the same size.
After thorough flushing, apply a clean bandage and keep the wound elevated if it’s on a hand or arm. You’ll want a tetanus booster if you haven’t had one in the past five years, and Cleveland Clinic recommends getting it within 48 hours of any deep wound contaminated with saliva. Most animal bite wounds are not stitched closed immediately because closing them traps bacteria inside, increasing the infection risk.
Why Possum Bites Are Uncommon
Despite their reputation for hissing and baring all 50 of those teeth, opossums are not aggressive animals. The dramatic open-mouth threat display is mostly bluff, and their more famous defense is playing dead. Actual bites to humans typically happen when someone corners a possum, tries to handle one, or accidentally steps on one in the dark. Pets are more likely to be bitten during a backyard encounter than people are.
One notable point: opossums are remarkably resistant to rabies. Their body temperature is lower than most mammals, which makes it difficult for the rabies virus to survive in their system. While no animal can be considered completely rabies-free, the risk from an opossum bite is significantly lower than from a raccoon, skunk, or bat bite.