If you are concerned about your dog's skin lesions, it is important to consult a veterinarian. They can properly diagnose the cause and recommend the appropriate treatment.
Here are some common causes of skin lesions in dogs:
* Allergies: Food, environmental allergens (like pollen), or flea bites can cause skin irritation and lesions.
* Bacterial or fungal infections: These can lead to red, itchy, and sometimes pus-filled lesions.
* Parasites: Fleas, mites, and ringworm can cause skin irritation and hair loss.
* Hormonal imbalances: These can cause skin problems, including lesions.
* Autoimmune diseases: These are less common but can also cause skin lesions.
* Cancer: In some cases, skin lesions can be a sign of cancer.
Remember, it is crucial to get professional medical advice for your dog's health.