If we suffer from new disorder which has never happend before, then how will the doctor treat?

Proper diagnoses: First you have to be properly diagnosed which entails a complete history, physical exam and standard lab studies to begin with. Than the most appropriate treatment for your condition will be prescribed. If you feel you have an illness I suggest you go to a clinic immediately to be evaluated. I wish you well with your health. Have a nice day!

Evaluation.: Your doctor should generally start from the beginning with a thorough history of your current plight, complete physical examination and delineation and review of any helpful relevant testing. Once a diagnosis is reached, then treatment can be initiated.