Final answer:
Pedro should check with his regular doctor first and if needed, the regular doctor can refer him to a specialist.
Step-by-step explanation:
When Pedro hurt his back weightlifting, he should check with his regular doctor first. The regular doctor can assess the initial condition and provide recommendations. If the regular doctor feels that it's necessary, they can refer Pedro to a specialist for further evaluation and treatment.
Learn more about Seeking medical advice for a back injury