- Parasites and allergies are the most common reasons dogs scratch themselves.
- Scratching can often lead to a secondary infection.
- Localized scratching and redness to a specific area could be from a possible contact irritation from a product or chemical or even an insect bite. Bathe the dog with an oatmeal shampoo.
- If scratching is seasonal: Winter - Could be caused by dust mites or human dander. Summer - Could be caused by grass or pollen.
- Bacteria or yeast may multiply on scratched raw skin and cause further irritation and scratching.