What should you know about septic cellulitis in dogs?

The infection can enter through a bite, puncture, wound, ulcer, or irritated skin and spread through tissue beneath the surface. The affected area may feel hot, look red, become firm or swollen, and be painful to touch. Pus, discharge, a bad smell, or a wound that is enlarging can signal a more serious process. Cellulitis is different from a simple surface scrape; a veterinarian may need to examine the wound, look for a pocket of infection, and assess the dog’s general condition.

Arrange veterinary care promptly. Keep the dog from licking or chewing the area, and prevent further contact with dirt. Do not squeeze a swelling, open it at home, or apply human creams or leftover antibiotics. A veterinarian may clean the wound, drain an abscess when appropriate, prescribe treatment, and check for an underlying bite, foreign material, or deeper infection. Dogs with diabetes or other health problems may need closer monitoring.

Seek emergency veterinary help if the dog is very weak, confused, collapsing, breathing unusually, refusing water, vomiting repeatedly, or developing rapidly spreading redness and swelling. Fever with marked lethargy can indicate that infection is affecting the whole body. Sepsis is a medical emergency, so do not wait for a skin wound to look dramatic if your dog’s behaviour or alertness changes.

Ask whether the infection is superficial or deep, whether an abscess or foreign body is present, how to protect the wound at home, and which changes should trigger an emergency visit. Tell the veterinarian when the swelling began, whether there was a bite or puncture, and whether the dog has had fever, reduced appetite, or unusual tiredness.