I need immediate medical help.

Meaning

I require medical assistance urgently.

Examples

• John: I've been in a car accident and I'm bleeding heavily.
• Alice: Oh my god! Call emergency services immediately! <b>I need immediate medical help.</b>
• John: I'm trying, but I'm in so much pain.
• Alice: Stay calm, help is on its way. Just repeat, '<b>I need immediate medical help</b>' to the operator.