Hi Lezina,
Sorry to hear about this.
This is called epistaxis and without other information, I can only talk about this clinical symptom in a general way as it would apply to any dog. The very quick, simple and absolutely best answer is to see your veterinarian for a consultation and physical examination. There are many conditions that can cause nose bleeding in dogs and some can be very serious. The possibilities include trauma, bacterial infection, fungal infection, cancer, lodged foreign material, tooth abscess, bleeding/clotting disorders along with others. The typical diagnostics tests I would initially perform would be a urinalysis, thorough general blood work, a coagulation profile, X-rays and a really thorough exam with a high-powered light of the nostrils and the oral cavity. Keep in mind that this is a challenging area to investigate as it is encased in bone, down a hole and could be within the skull to a degree. Some of these conditions are often evaluated with the use of a CT scan, which is done at specialty centres and can be quite expensive.
I hope this gives you some insight.
Dr. Clayton Greenway