Hematologic diseases are mostly intractable diseases with hidden onset and symptoms. Even if the disease occurs, the patient is often unable to detect it by himself, and it is mostly found when he visits a doctor for other diseases or during a health checkup. Therefore, it is particularly important to raise awareness of this disease for early detection and early treatment. If the following 10 conditions occur, you need to be highly alert to blood system diseases and consult a doctor in time. 1, the body is getting weaker and weaker, sighing “this is not as good as the old days”, mental fatigue, limb soreness, less energy, sleepy and lazy; 2, weak, often catching colds or colds that do not heal for a long time; often have a low fever, or even a high fever; 3, dizziness, headache, dizziness, blurred vision, ringing in the ears, palpitations, shortness of breath, and even fainting; 4, pallid and yellowish, weak and floating, light lips and tongue with no blood, and even a faint; 4, pale and yellowish, with no blood. Pallor, yellowish, flaccid, pale and bloodless lips and tongue, pale conjunctiva; or dark eye sockets (commonly known as “dark circles”), or reddish, dark and lusterless face (true erythrocytosis); 5, withered hair, ligustrum, hair loss; nails are flat and sunken, easily folded and easily cracked; skin is dry and wrinkled with poor elasticity; oral erosion, swollen gums, and the tongue is light and mossless. Bleeding spots or purple patches are common on the skin; bleeding from minor punctures and scratches; bruising and squeezing will result in bruising and ecchymosis under the skin; nosebleed, bleeding gums, purple and dark blood bubbles on the oral cavity and tongue; excessive menstruation as in the case of a crash, or continuous dripping regardless of the cycle; pressure pain in the sternum and tibia, and pain in joints of the limbs, or osteoarthralgia; abdominal distension, and enlargement of the liver, spleen, and lymph nodes; and abnormalities in blood and bone marrow tests. Abnormal blood and bone marrow tests.