There are a few things that guarantee treatment success. 

The most important one is the patient history. It's more important to know the how, when and where about the rash than it is to know that you have a rash or to just see a picture. The patient history gives the healthcare professional more context about the presented condition. 

The signs and symptoms that the patient is experiencing are also very important. Yes you have heartburn BUT is the heartburn accompanied by blood in the vomit or stool? Is there any pain in the abdomen? When is the pain worse/ better? This is more important than leaving it at heartburn. 

Choosing the correct treatment plan is all about making the correct diagnosis. Patients MUST allow the healthcare professional to make the diagnosis instead of jumping to the name of the medicine of the procedure that they think needs to be done.