Sinus cancer bleeding is characterized by frequent small amount of bleeding from one side of the nose, blood in snot or accompanied by bloody pus snot and foul smell. Because the site of sinus is more hidden, the symptoms are not obvious when the tumor is small in the early stage. Sinus cancer mostly occurs unilaterally, and the patients often have unilateral nose blockage, nose bleeding, peculiar smell and secretion in nasal cavity. When the tumor grows to a large size, it will invade the eyes, face and even oral cavity, resulting in loose teeth, protruding eyeballs and facial swelling. Elderly patients with the above conditions should seek medical treatment as early as possible. Sinus cancer needs to be differentiated from sinusitis, which is an inflammatory lesion of sinus divided into two kinds: acute and chronic, and can be treated by medication and local treatment, as well as improving life style to avoid recurrence, so as to achieve better therapeutic effect and better prognosis; sinus carcinoma is a malignant lesion of sinus, which is destructive in the process of development and harmful to the body, and its symptoms are hidden in early stage and not easy to be detected, and with the progression of the lesion, its symptoms will be aggravated gradually and its harm will be aggravated gradually. With the progress of the disease, the symptoms will gradually worsen and the harm will be aggravated, and the treatment will be more difficult.