Asthma attacks usually do not have fever. Typical symptoms of asthma are chest tightness, shortness of breath, cough, etc. In severe cases, dyspnea and hypoxemia may occur. 1. Symptoms of a mild asthma attack are walking or walking up stairs, and shortness of breath and increased respiration may occur when walking uphill. 2. In a moderate asthma attack, speech is intermittent, breathing is markedly increased, and may be accompanied by trismus, a loud and diffuse rumbling sound can be heard. 3. In severe cases, wheezing sounds can be heard, and shortness of breath, chest tightness, the need to sit up and breathe, speech can only be expressed in one word, and the number of breaths exceeds 30 per minute during sleep. 4. Critically ill patients are unable to speak, drowsy, and even have blurred consciousness. However, if combined with a lung infection, asthma can also present with symptoms of fever. Asthma patients should go to the hospital in time to improve the relevant examination, standardized treatment under the guidance of the doctor, and develop good living habits.