Why is my dog’s wound getting bigger instead of smaller?
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Overview
If your dog’s wound is getting bigger instead of smaller, it often means the area is being irritated, licked, rubbed, contaminated or not healing as expected. Sometimes the wound may look larger because swelling, discharge or scab loss is making it seem worse, but it can also mean there’s an underlying issue that needs attention.
It’s worth checking the wound closely and keeping an eye on any change in size, smell, discharge or pain. If it’s clearly worsening, not improving after a short period, or your dog seems unwell, veterinary advice is appropriate.
Things To Check
1. Check whether your dog has been licking, scratching, chewing or rubbing the area, especially when left alone or overnight.
2. Look closely for redness, swelling, heat, discharge, a bad smell, scab loss or skin that’s starting to split open.
3. Compare the wound with yesterday’s appearance if you can, so you can tell whether it’s genuinely getting bigger or just looking more inflamed.
4. Check whether the wound is in a place that bends, stretches or gets dirty easily, such as a leg, paw, chest or near the tail.
5. Think about whether grooming, bathing, exercise, outdoor play or muddy ground could be irritating it.
6. Notice whether your dog seems sore, quieter than usual, off food, or less willing to move normally.
7. Check for anything trapped in the wound, such as debris, a grass seed, a stitch that’s come loose, or thickened crusting.
Common Causes
The most common reason is repeated irritation. Dogs often lick or rub wounds without meaning to, and that can stop the skin settling down.
Another common cause is infection or contamination, especially if the wound has been exposed to dirt, moisture or debris. Infected wounds may become more red, swollen or smelly, and can appear to enlarge.
Movement can also slow healing. If the wound is over a joint or on an active area of the body, the skin may keep pulling apart as your dog walks, runs or lies down.
Sometimes the issue is simple scab loss. If a scab comes off too early, the wound can look bigger again even though it had started to close.
Less commonly, there may be something underneath the skin preventing healing, such as a retained foreign body or ongoing inflammation. These are harder to spot at home.
What To Do
Keep the area as clean and dry as you can, and try to stop your dog from licking or scratching it. If the wound is on a part of the body that gets dirty easily, limit muddy walks, swimming and rough play until it settles.
Take a clear photo once a day in the same light and from the same angle. That makes it much easier to judge whether it’s improving or spreading.
Use gentle routine care only. Avoid putting on anything harsh unless your vet has already told you to use it.
If the wound is not clearly improving, or it keeps reopening, book a vet check. Slow-healing wounds are often easier to manage early than after they’ve become more inflamed.
When To Contact A Vet
Contact your vet if the wound is getting bigger, looks infected, is producing discharge, smells bad, or seems painful. You should also seek advice sooner if your dog is lethargic, off food, limping, or the wound is near an eye, joint or paw and seems to be worsening.
If the wound opened after a bite, puncture, surgery, or a stitch came apart, it’s best to have it assessed rather than waiting.
Products That May Help
For home management, having suitable pet care items to support gentle cleaning and routine hygiene can make it easier to keep an eye on the wound and reduce extra irritation around the area.
Related Questions
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Atlas is here to support owners with practical, easy-to-understand guidance. It is not a substitute for professional veterinary advice. If you're concerned about your animal's health, symptoms worsen, or something doesn't feel right, contact your vet.