Bleeding in the digestive system, potentially but not definitely an ulcer.
Have it looked into by a doctor immediately.
Could be Thrush or an STD. Either way you need to get to the doctor NOW.
The purpose of mucus in the nose is to trap dust, pathogens, and other particles, preventing them from entering the respiratory system. It also helps to keep the nasal passages moist, which is essential for proper function and comfort. Additionally, mucus contains antibodies and enzymes that help protect against infections. Overall, it plays a crucial role in maintaining respiratory health.