Dengue fever can be manifested as high fever, rash, headache, generalized muscle pain, joint pain, which are the typical symptoms of dengue fever, and the severity of which can lead to severe blood loss and finally hemorrhagic shock in the patient. Clinically, dengue fever is generally categorized into two types:. 1. Dengue fever: i.e. typical dengue fever, which is mild and manifested by high fever, rash, headache, generalized muscle pain, joint pain, and enlarged lymph nodes. Fever usually lasts for 3 days to 1 week, but a few patients will feel severe pain in the bones and joints, so it is also called “bone-breaking fever”. 2. Dengue hemorrhagic fever: it is a serious clinical type of dengue fever, the condition is more serious, the initial stage is the same as the typical dengue fever, fever, headache, rash and other symptoms, and then there is a serious hemorrhagic phenomenon, which is manifested as subcutaneous hemorrhage leading to a large area of purpura on the surface of the skin, nosebleeds, gastrointestinal bleeding, bleeding in the genitourinary tract, etc. The loss of blood may be too much, and hemorrhagic fever may occur. Excessive blood loss may occur hemorrhagic shock, manifesting as cold extremities, pale or cyanotic skin, oliguria, palpitations, etc. If the above symptoms may be related to dengue fever, it is necessary to consult the doctor in time and go to the hospital for further examination and clarification.