Inflammation, immunity diseases, and allergic reactions are all connected with your immune system and the way the body reacts to what it considers to be foreign invaders that are a risk to your health. Although you may not understand that all three have the basic underlying cause, in fact, they do, and here is why.
Inflammation manifests as pain and swelling in the inflamed area, and not only can the area also get hot, but it can also raise your temperature in general, commonly called a fever. Fever is the body0s way of raising the temperature above that at which foreign organisms such as bacteria and viruses can live, so any inflammatory condition that results in fever by definition must be an immune response through the body trying to eliminate foreign invaders.
If your body gets injured in any way, your immune system responds and usually calms down again if decide that the injury is not serious. Your immune system is actually initiated by what is known as pro-inflammatory hormones, such as prostaglandins that stimulate the nerves to signal pain and swell the blood vessels close to the injury to make room for the large white blood cells when they arrive