The definition of a patient is very simple. Anybody goes to see a doctor with a complaint. The nature of the complaint varies for a particular disease from one patient to another. Everybody has a doctor.
Many people are becoming more scared (or fond of) about any slight disturbance in their body- be it of headache,cold, nausea or vomiting etc. this article talks about how we are inventing diseases and making many people to become rich. Read on.
Inventing diseases to sell drugs - The Hindu