Patients with fatigue, nausea, vomiting, limb weakness, the main causes include acute gastroenteritis, gastrointestinal colds, early pregnancy, and anemia, the specific causes and treatments are as follows: 1. Acute gastroenteritis: the main manifestations of diarrhea, abdominal pain, nausea, vomiting, generalized fatigue, etc., in which diarrhea is the most common symptom, but the nature of the stool can be due to the different causative agent of the infection leads to a large difference. For example, rotavirus infection may result in watery or yellowish-green stools, norovirus infection may result in loose watery stools, and invasive bacterial infections may result in mucus, pus, and blood stools. Some patients develop concomitant symptoms such as headache, fever, malaise, nausea, muscle pain, etc. In severe cases, the loss of large amounts of water may lead to shock. When acute gastroenteritis attack, patients should go to the hospital in time to improve the relevant examinations, such as routine stool, blood, pathogenetic examination, protein test, etc., to clarify the infectious agent, under the guidance of the doctor to use antimicrobial drugs such as norfloxacin, ciprofloxacin, etc., and follow the doctor’s instructions to oral rehydration salts, to avoid the loss of water to avoid the body caused by electrolyte disorders and even shock; 2, gastrointestinal cold: nausea, vomiting, generalized tiredness Symptoms. Patients should go to the hospital in time, actively cooperate with the doctor to control the primary disease, and use penicillin, cephalosporin and other anti-infective drugs as prescribed by the doctor. During the period of taking drugs should be light diet, avoid spicy and stimulating food, quit smoking and alcohol, to avoid further development of the disease; 3, early pregnancy: due to the influence of pregnancy factors, early pregnancy can appear obvious symptoms, such as weakness, nausea, vomiting, limb weakness, etc., you can go to the hospital to check the blood chorionic gonadotropin, to clarify the pregnancy to take the appropriate way to protect the fetus; 4, anemia: for example, part of the women due to the anemia factor, the lack of red blood cells can not be able to tissue organs. For example, some women due to anemia factors, the lack of red blood cells can not be adequate oxygen supply to the tissues and organs, can cause fatigue, nausea, nausea, limb weakness, easy to fatigue, dizziness and other symptoms, after the cause is clear, the oral iron can be used for treatment.