What 3 things is a diagnosis based on in first aid?

A diagnosis in first aid is based on three main things:

1. Symptoms: These are the patient's subjective feelings, such as pain, nausea, or dizziness.

2. Signs: These are objective findings that can be observed by the first aider, such as a rash, swelling, or bleeding.

3. Mechanism of injury: This is the sequence of events that led to the patient's symptoms and signs.

By considering all three of these factors, the first aider can develop a working diagnosis and provide appropriate treatment.