When a patient is encountered with a suspected severe allergic reaction, they should immediately be taken to a nearby hospital as soon as possible by calling the 120 or 999 emergency number. Before medical assistance is obtained, the patient should first be helped to quickly remove the allergen and rest flat on his or her back. If there is vomiting, keep the head to one side and remove the vomit to prevent asphyxiation due to accidental inhalation of the vomit. If respiratory or cardiac arrest has occurred, cardiopulmonary resuscitation should be administered immediately to allow for the arrival of hospital resuscitation teams and to buy precious time for treatment.
If there are no witnesses or people nearby to call for help, it is vital that the patient resuscitates himself. For those with a previous history of allergy, who have a suspected severe allergic reaction, if you have your own epinephrine auto-injector, you can first inject yourself. Afterwards call 120 or 999 for help, you should give details of the address you are at, your symptoms and other circumstances, and take a safe place nearby to lie flat and wait for help before loss of consciousness and limb weakness occurs to prevent secondary injuries such as falls.