Can A Lawyer Be Called To Ensure My Friend Receives Medical Attention Despite Her POA Son’s Refusal And Inadequate Hospice Care?

I just ask it My friend needs medical attention. He son is POA and doesn t want her to have medical attention. She has deep sores one quarter inches deep. Hospice was called in and not giving her good service. Can a lawyer be called in to protect her right. She wants a Dr or hospital help