Hi, I hope to provide some assistance for you and your dog.

What you are describing on your dog is probably an allergic hot spot. When dogs get allergies--as are very common this time of year--they get skin symptoms, including hot spots. Hot spots are areas where the dog becomes intensely itchy and may rub their face until the skin is abraded. Then the skin leaks fluid, which mats the fur and makes it sticky. They are usually painful areas if you touch or mess with them. Hot spots usually do not resolve without treatment.

The treatment for a hot spot is to treat the dog with oral steroids and oral antibiotics, as well as (usually) clipping and cleaning the area to allow it to heal. These medications will need to be prescribed by your veterinarian.

Until you are able to get your dog to the vet (I know it's the weekend now), you can clean the wound with peroxide, then apply a cortisone anti-itch ointment to the area twice daily. However, this alone is unlikely to clear it up unless the area is very small, so you should still go to your veterinarian to get the oral medications also.

I hope that this has been helpful. Let me know if you have further questions, and best of luck with your dog.