@ysmina-- Usually, it doesn't. Inflammation is what naturally happens during healing, when foreign intruders are killed and removed and when injuries heal. The process usually does not cause any damage to regular cells.
There are certain cases of systemic or chronic inflammation however, where the body's own health cells may be damaged. This is particularly true if the inflammation is the result of a faulty immune system response. Certain diseases and disorders may cause the immune system to work over time or attack the body's own cells. Other times, constant inflammation may cause damage to tissues over the long term. This type of damage is often seen with arthritis, where constant inflammation causes problems in the joints.