Summary
Highlights
Inflammation is a crucial part of the body's immune system, serving as a normal biological response to harmful or irritating stimuli. It is categorized into acute inflammation, which is short-term, and chronic inflammation, which persists over a longer duration.
Acute inflammation is a healthy physiological response, often indicating wound healing. In contrast, chronic inflammation is directly linked to a wide range of degenerative health disorders, including autoimmune diseases, obesity, diabetes, and atherosclerosis.
Acute inflammation has a rapid onset, while chronic inflammation has a slower onset. The prominent cellular infiltrate differs, with neutrophils being key in acute inflammation, and monocytes, macrophages, and lymphocytes in chronic inflammation.
Tissue injury and fibrosis are mild and self-limiting in acute inflammation but severe in chronic conditions. Acute inflammation shows prominent local and systemic signs like swelling, redness, pain, and heat, which are often absent in chronic inflammation.
Acute inflammation is caused by infections, physical agents, or foreign bodies. Chronic inflammation results from persistent acute inflammation or autoimmune reactions and has a longer duration. Outcomes include resolution or abscess formation for acute, and tissue destruction and fibrosis for chronic inflammation.