Omicron is one of the new crown variant strains. Patients infected with the Omicron strain may experience respiratory, digestive, and systemic symptoms, while some infected patients may be asymptomatic. 1. Respiratory symptoms: Patients may experience respiratory symptoms such as coughing, runny nose, coughing up sputum and breathlessness. 2. Gastrointestinal symptoms: Patients may also experience gastrointestinal symptoms such as nausea and vomiting, loss of appetite and indigestion. 3. Systemic symptoms: patients also have fever, fatigue, loss of taste and smell and other systemic symptoms. In addition, some people infected with Omicron do not show any symptoms, and the diagnosis can only be confirmed by the new crown nucleic acid test. If you suspect that you are infected with Omicron, you should wear a good mask and go to the prevention and control center for nucleic acid testing, and if the diagnosis is confirmed, you need to follow the instructions of the prevention and control center to go to a special hospital for isolation and treatment.