Why is my dog's wound getting bigger instead of healing?
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Overview
If your dog's wound is getting bigger instead of healing, it's often because the area is being irritated, licked, knocked, or has become infected. Sometimes a wound looks worse before it looks better, but a wound that is spreading, more swollen, or producing discharge needs a closer look.
There can be several reasons for this, so it's worth checking the wound carefully and watching for changes over the next day or so.
Things To Check
1. Check whether your dog has been licking, chewing, scratching, or rubbing the area.
2. Look for redness, swelling, heat, discharge, a bad smell, or skin that looks more broken down than before.
3. See if the wound is near a joint, paw, tail base, or another place that moves a lot and may keep reopening.
4. Check whether the wound has been getting wet, dirty, or exposed to mud, bedding, grass, or grooming products.
5. Notice whether your dog seems sore, more sensitive, or less willing to let you touch the area.
6. Watch for general changes such as tiredness, reduced appetite, or a shift in behaviour.
7. If you can do so safely, compare the wound with a photo from the previous day to judge whether it's truly enlarging.
Common Causes
The most common reason is ongoing irritation. Licking, scratching, or friction from collars, harnesses, bedding, or movement can stop the skin edges from settling.
Infection is another common cause. A wound can become more inflamed, produce discharge, or start to spread if bacteria get into the area.
Some wounds stay open because there is dead tissue, trapped debris, or repeated contamination from the environment.
Less commonly, a wound may look bigger because the skin around it is inflamed, bruised, or breaking down, even if the original injury was small.
What To Do
Keep the area as clean and dry as you can. Prevent licking or chewing if possible, and avoid any rough handling, bathing, or grooming around the wound unless your vet has already advised it.
Use a photo and a simple note of size, colour, discharge, and swelling so you can tell if it is improving or worsening. If the wound is on a limb or in a place that keeps rubbing, try to reduce activity that may keep reopening it.
If the wound is muddy or dirty, gently remove loose debris only if this can be done safely and without making the area worse. Don't use human creams, sprays, or home remedies unless you've been told to.
When To Contact A Vet
Contact your vet promptly if the wound is enlarging, becoming more painful, has pus or a strong smell, or if your dog seems unwell. Wounds on the face, paw, near a joint, or after a bite or deep puncture often need professional assessment sooner.
If your dog is bleeding, very sore, or the skin is opening up quickly, it's best not to wait.
Products That May Help
Keeping your dog's coat, paws, and skin clean can be part of sensible home management while you're monitoring a wound. This collection may be useful for routine care around the affected area.
Related Questions
Why does my dog's wound keep reopening?
How can I tell if my dog's wound is infected?
What should I clean my dog's wound with?
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.