Patients with redness, fever and conjunctival congestion and increased redness in the eyes may be associated with diseases such as measles, epidemic hemorrhagic fever and acute conjunctivitis. Measles is a contagious disease, which is a respiratory disease caused by infection with the measles virus. Typical symptoms of the patient are fever, conjunctival congestion, and coughing and tearing. Epidemic hemorrhagic fever, also known as renal syndrome hemorrhagic fever, is mostly due to infection with the epidemic hemorrhagic fever virus and lead to a kind of infectious disease, in the clinic, the patient can be manifested as redness of the face, fever, and orbital pain, conjunctival hemorrhage and other uncomfortable symptoms. Acute conjunctivitis is an infectious disease that occurs when the conjunctiva is affected by viruses or bacteria, and is mainly characterized by conjunctival congestion and purulent secretions, and when symptoms are severe, patients may also experience fever and facial skin redness. It is recommended that patients with obvious symptoms of redness and fever should consult a doctor promptly to evaluate their condition and follow the doctor’s instructions for treatment.