Rash on face and neck may be caused by acute urticaria, measles, scarlet fever, etc. It is necessary to apply cetirizine, dexamethasone and other medicines for the cause and take reasonable rest.
1. Acute urticaria: pollen, seafood, animal tissues, metal foreign bodies, irritating chemical gases, etc. directly contact with the skin or through the digestive tract, respiratory tract, etc. into the body, triggering an allergic reaction and the above symptoms. Antihistamine drugs such as cetirizine hydrochloride and chlorpheniramine maleate can be used for treatment, and glucocorticoid drugs such as dexamethasone can be used if necessary.
2. Measles: acute respiratory infectious disease due to infection of measles virus, early symptoms such as fever, dry throat, cough, etc. Skin rash starts to appear on the head, face, neck and other parts of the body after 3~4 days of fever. Reasonable rest, nutritional intake and water intake, enhanced ventilation and isolation are required.
If the body temperature exceeds 38.5℃, non-steroidal anti-inflammatory drugs such as ibuprofen and acetaminophen can be used to lower the temperature, and appropriate water intake.
3. Scarlet fever: an infectious disease caused by group A beta-hemolytic streptococcal infection most commonly seen in children. Bacterial exotoxin, hemolysin, streptokinase and other substances can cause fever and capillary hemorrhage, so skin rashes appear, and need to be applied with antibiotics such as penicillin, ceftazidime, azithromycin and other treatments.
Rash on the face and neck may be related to a variety of factors, it is recommended to consult a doctor to clarify the diagnosis, pay attention to the use of medication under the guidance of a physician.