There are black residues in the cat's fur, which may be parasites or fleas, and need to be treated with insect repellent. If it is a scab, it may be moss. It is recommended to take the cat to quarantine, then wash and disinfect the cat's things, apply ointment to the cat's fur, and wear a collar at this time to prevent the cat from licking it. ​​​​​​

What to do if cat moss grows on your cat? If your cat has cat moss, you should pay attention to the cleaning of the cat, maintain a clean living environment, and avoid bacterial infection. Roundworms are yellow worms that are a parasite that affects both humans and cats. After being infected with roundworms, cats may experience vomiting, lethargy, weight loss, and developmental delay. If the infection is widespread, it can lead to intestinal obstruction, intussusception, and even intestinal perforation.

Roundworm larvae that pass through the lungs can cause respiratory symptoms in cats, including coughing and, in severe cases, difficulty breathing, called pneumonia. Roundworms can affect the growth and development of cats, and in severe cases can even lead to death. Hookworm, yellow nematode. After infection, cats may develop symptoms such as weight loss, hair loss and easy shedding, loss of appetite, lethargy, vomiting, and even hematopoiesis, accompanied by a foul odor. Hookworm larvae can cause itching and inflammation of a cat's skin if they pass through the skin in large numbers.