Do lots of people get inflammatory conditions, or is it unusual?

Common: Your term is somewhat vague, though, and could be taken to mean almost anything. Inflammation occurs in infection (even colds), in autoimmune disease, in cancers, and really every day. Inflammation helps our body to fight disease, but can sometimes cause it too.

Webster's definition: Webster's dictionary defines "inflammation" as a local response to cellular injury marked by capillary dilation, white blood cell infiltration, redness, and heat. It is a mechanism initiated to eliminate noxious agents (infection, toxins, foreign substances) and the repair of damaged tissue. Any organ can be involved. While all are treatable, it can be acute, self-limited, relapsing, chronic.

Define: Inflammation is part of the body's repair mechanism. Even walking or moving causes small amounts of inflammation in everyone. The problem is when it is excessive. It can range from arthritis and tooth decay to multi-organ failure and autoimmune disease. Generic markers are crp, esr, which aren't useful on their own.