What should you do if a client has a significant allergic reaction during a service?

In the event of a significant allergic reaction during a service, the priority should always be the client's health and safety. Calling for medical assistance immediately is the appropriate action because an allergic reaction can escalate quickly and may lead to serious complications, such as anaphylaxis, which can be life-threatening.

By summoning medical help, you ensure that the client receives professional care and emergency treatment without delay. It's essential to manage the situation promptly and to have trained medical personnel assess and address any severe symptoms that could arise.

Other responses, such as applying a cold compress or offering water, do not address the potentially serious nature of an allergic reaction and could delay necessary treatment. Administering medication without a doctor's consent is not advisable, as it can pose further risks to the client's health, especially if the type and dosage of medication are not appropriate for their specific condition.