Anemia mainly refers to hemoglobin and/or red blood cell count below the normal range, resulting in the inability to transport enough oxygen to ensure the normal operation of the body, thus affecting the patient’s skin mucosa, circulatory system, respiratory system, digestive system, endocrine system, reproductive system, etc. Therefore, there are no specific 5 obvious signs of anemia. Clinically, neurological symptoms such as dizziness, headache, insomnia, fatigue, memory loss, and numbness of the limbs are considered common signs of anemia, and patients need to seek timely medical attention and take symptomatic treatment to relieve discomfort: 1. Skin mucosa: Due to the reduced blood supply and poor nutrition in the patient’s body, it is easy to trigger roughness, loss of luster, and pallor of the skin mucosa. If the patient fails to intervene in time, there is a possibility of local skin ulcers; 2. Circulatory system: Patients with anemia are affected by insufficient blood supply to the heart, thus affecting the circulatory system, resulting in discomfort such as accelerated heart rate and palpitations, and in serious cases, the consequences of abnormal heart structure and cardiac insufficiency may be induced; 3. Respiratory system: Patients with poor breathing and shortness of breath when walking or doing physical labor are considered to have anemia. If the patient is uncomfortable, the possibility of anemia is considered. Generally, the symptoms will be aggravated with the degree of anemia; 4. Digestive system: mainly due to the low number of red blood cells in the organism, it may lead to a decrease in the secretion function of glands in the digestive tract, which in turn leads to digestive system symptoms, such as difficulty in swallowing, bloating, loss of appetite, indigestion, constipation, nausea, vomiting, etc.; 5. Endocrine system: anemia is a vicious circle, due to insufficient blood oxygen supply Due to insufficient oxygen supply, the patient’s organism gradually decreases the demand for oxygen, which further inhibits the production of red blood cells and aggravates the symptoms of anemia, and at this time, with the development of anemia, the patient will have abnormal secretion of hormones such as thyroid, gonads and adrenal glands, which eventually leads to disorders of the endocrine system; 6. This will have an impact on the reproductive system, leading to amenorrhea, hypomenorrhea, loss of libido, changes in sexual function and other discomforts.