To help me understand and give you the best advice, please tell me:
* What flea treatment are you using? (Brand, type, etc.)
* How long have you been using it?
* How often do you use it? (Following the product's instructions?)
* What are you seeing? (Fleas on your dog, flea dirt, bites, etc.)
* Have you tried any other treatments?
Once I have more information, I can better guide you on what to do next. Remember, it's crucial to consult with your veterinarian for personalized advice and to rule out any underlying medical conditions.