1. Foreign Object: A foreign object, such as a thorn, piece of glass, or splinter, may have become lodged between your dog's toes. This can cause pain, inflammation, and limping.
2. Infection: A bacterial or fungal infection can also cause a red bump and limping. Infections can be serious and may require antibiotics or antifungal medication.
3. Allergic Reaction: Some dogs may experience an allergic reaction to certain substances, such as pollen, grass, or food. This can cause swelling, itching, and redness between the toes.
4. Puncture Wound: A puncture wound from a sharp object, such as a nail or animal tooth, can also lead to limping and a red bump. Puncture wounds can be deep and may require stitches or other treatment.
5. Fracture or Dislocation: In some cases, limping and a red bump between the toes may be a sign of a fracture or dislocation of the foot. This is especially true if the limp is severe or if your dog is refusing to put weight on the affected leg.
It's important to have your dog evaluated by a veterinarian as soon as possible to determine the cause of the limping and red bump. The vet can properly diagnose the issue and provide appropriate treatment.