Respiratory infections:
- Mycoplasma pulmonis (Mycoplasmosis or "Myco")
- Sendai virus
- Pneumonia
Foreign objects:
- Food stuck in the nose
- Dust or dirt
- Bedding material
- Toys
Allergies:
- Dust
- Pollen
- Food
- Chemicals
Trauma:
- Hitting the nose on something
- Being scratched or bitten by another rat
- Rough handling
Tumors:
- Nasal tumors
- Pituitary tumors
Blood clotting disorders:
- Von Willebrand disease
- Hemophilia
Vitamin C deficiency:
- Scurvy
If your rat's nose is bleeding, it is important to take them to the vet as soon as possible. The vet will be able to determine the cause of the bleeding and prescribe the appropriate treatment.