Check one paw and the rest of the dog
Note which toes are involved, whether one or several paws are affected, and whether the dog limps. Look for drainage, blood spots, a puncture, broken nail or grass awn. Then check ears, belly and other feet for signs of a wider allergy or skin pattern.
Protect the foot without sealing in moisture
Prevent persistent licking and keep walks short on clean, gentle surfaces until advice is available. Do not lance the bump, dig for a deep object or use acne products. Tight home bandages can trap moisture or impair circulation, especially when swelling increases.
Testing may be needed because appearances overlap
A veterinary examination may include skin cytology, scraping, hair sampling, culture or investigation for allergy and mechanical pressure. A recurrent bump in the same place has a different workup from a fresh superficial splinter. Photos taken before cleaning can help document drainage and size.
Pain and drainage move the appointment forward
Arrange prompt care for limping, marked swelling, pus, bleeding, an open tract or repeated recurrence. Seek urgent care if swelling travels up the limb, the dog is feverish or weak, or a penetrating foreign body is suspected. Do not delay while trying multiple soaks or leftover medicine.
Location and repetition change the investigation
A single bump that appeared after a walk through seed grass raises different questions from several recurring nodules on weight bearing areas. Record the walking surface, recent clipping, wet feet, season and whether the same toe was affected before. Wide or splayed paws, short broken hairs and repeated friction may contribute, while itching on several feet can point toward a broader skin problem.
Check the foot daily without squeezing it. A photo from above and one from the side can show whether the bump is enlarging. If the clinic prescribes foot care, confirm how long the paw may remain wet and whether a boot should be removed indoors. Constantly covered skin can soften, trap moisture and create a second problem.
Record whether licking starts before or after exercise and whether boots, road salt or rough ground change it. That sequence helps distinguish a painful nodule from a foot that became inflamed after prolonged licking, while still leaving the final assessment to the veterinarian.
Bring the history of previous episodes
If the bump has returned, bring the names and dates of earlier treatments and any test results you have. Note whether it fully disappeared between episodes. A record of recurrence is more useful than simply describing the paw as bad again.