A swollen paw pad can follow trauma, burns, a foreign body, insect sting, infection, or inflammation and should be checked when painful or persistent. A single sign rarely identifies one diagnosis, so the safest approach is to look at the whole pattern: when it started, how often it happens, what triggers it, and whether your dog is otherwise acting normally.
Quick Answer
A swollen paw pad can follow trauma, burns, a foreign body, insect sting, infection, or inflammation and should be checked when painful or persistent. Check for limping, bleeding, heat, discharge, a foreign object, or worsening swelling, and avoid forcing a painful paw examination.
Possible Causes
Trauma or foreign material
Cuts, burns, splinters, thorns, cracked nails, or impact injuries can cause sudden paw changes. The timing, severity, and accompanying signs help determine how much weight to give this possibility.
Inflammation or infection
Interdigital inflammation, bacterial or yeast infection, and allergic disease may cause swelling, licking, or discoloration. The timing, severity, and accompanying signs help determine how much weight to give this possibility.
Normal pigment versus disease
Dark nail or pad pigment can be normal; a new painful change, drainage, or tissue swelling is more concerning. The timing, severity, and accompanying signs help determine how much weight to give this possibility.
Bottom Line
A swollen paw pad can follow trauma, burns, a foreign body, insect sting, infection, or inflammation and should be checked when painful or persistent. The most useful next step is not to guess a diagnosis from one symptom, but to document the pattern and judge whether normal function is changing. If the sign is persistent, painful, progressive, or accompanied by other abnormalities, veterinary evaluation is the safest course.
