The reason is because inflammation means pain in the body
Gingivitis is an an inflammation of the gingivae - the gums.
Inflammation is the body's way of dealing with unwanted materials and organisms in the body. It is a part of the immune systems reaction.
Lymphocytes cause the inflammation in some particular parts of the body
Inflammation is a sign that the immune system is at work in the body.
steroids are the best option for the treatment of any inflammation in the body.
If by fever you mean an increase in heat, the cause for this as a result of inflammation is the strong increase in blood-flow at the body's core temperature, to the site of the inflammation. A fever which is body-wide, is not necessarily part of an inflammation. The fever can be an extreme response to the damage or infection which caused the initial inflammation, but it can also be a normal response to an infection spreading throughout the body.
Throat
Inflammation is the body's response to injury or irritation, characterized by redness, swelling, and heat. Infection is the invasion and multiplication of harmful microorganisms in the body, leading to symptoms such as fever, pain, and fatigue. Inflammation can occur without infection, but infection often triggers an inflammatory response.
Inflammation is usually stimulated by the presence of trauma or injury in the body like wounds and the like.
Inflammation indicates that the healing response of the body has started.
Opthalmia or Opthalmitis, in general anything ending with "itis" refers to an inflammation state in a body part, for example tendonitis, inflammation of tendon.