Author: Mgr. Martin Jelínek
Expertise: nutrition, education in nutrition
Last expert review: September 3, 2024

Inflammation is one of the most important defense mechanisms of the human body. It is often associated with pain, swelling, or redness, but its main goal is to protect us and create conditions for healing. Whenever the body is exposed to damage – whether in the form of injury, infection, chemical substances, or excessive strain – the immune system triggers a complex reaction aimed at identifying the problem, limiting its impact, and subsequently repairing the affected tissue. Thus, inflammation is not a disease, but a process, that helps manage the disease.
When the body senses danger, white blood cells are activated and release various signaling substances (cytokines, etc.). These cause blood vessels to expand and increase blood flow so that more defensive cells can reach the area (this is why, for example, a small cut quickly becomes red and warm). This process occurs in the body daily, without us necessarily being aware of it, because the immune system constantly evaluates stimuli from the environment and the internal milieu and responds to minor deviations to maintain the internal environment's balance. Most of these microscopic "interventions" occur quickly and effectively, so we do not notice them at all. In this way, the body continuously repairs minor damage, neutralizes undesired microorganisms, and ensures that trivial stimuli do not turn into significant health problems.
However, inflammation also has its limits. If it is too strong or persists longer than necessary, it can start damaging tissues. This can occur, for instance, in diseases where the immune system reacts inappropriately or when the body repeatedly faces harmful stimuli. For this reason, inflammation is monitored in medicine as a very significant process – it is both a protector and a potential problem if it spirals out of control.
A special group includes so-called autoimmune diseases. In these cases, the immune system erroneously evaluates the body's tissues as foreign and triggers an inflammatory reaction against them. Here, inflammation does not arise due to infection or injury, but due to an immune regulation disorder. Typical examples are rheumatoid arthritis, certain thyroid diseases, or inflammatory bowel diseases. This type of inflammation is long-lasting and requires a specific therapeutic approach.
Inflammation can be divided into acute and chronic, which are two processes differing not only in duration but also in purpose and impact on the organism:
It is a fast, short-term reaction to a clearly identified damage. A typical example is an inflamed wound, tonsillitis, or a strained muscle. This type of inflammation usually lasts for several hours to days and has a clear beginning, middle, and end. After resolving the cause, it recedes, and the tissue returns to its normal state.
Conversely, it is a silent, long-term process that can last for months or years. It arises when the body is unable to remove a harmful stimulus, or when it is continuously exposed to stress, poor diet, lack of sleep, or smoking. Chronic inflammation can proceed insidiously and without significant pain, but it can be all the more dangerous. Today we know that it contributes to the development of many lifestyle diseases, such as type 2 diabetes, atherosclerosis, joint diseases arthritis, or some neurological difficulties (Alzheimer's disease, Parkinson's disease, multiple sclerosis, but also some chronic headaches, depressive disorders, or memory and concentration disorders).
While acute inflammation is beneficial and necessary for the body, chronic inflammation poses a long-term burden. It's similar to the immune system never "turning off" its alarm. In such a situation, the balance of the internal environment gradually deteriorates, tissue regeneration worsens, and the body may become more susceptible to other diseases. The goal of modern medicine and prevention is, therefore, not only to treat acute inflammations but mainly to prevent their chronic persistence. In this context, so-called low-grade inflammation is often discussed. It is a form of chronic inflammation that occurs in the background, without significant symptoms and pain. The organism is in a constant mild "standby mode," which places a long-term burden on the immune system and metabolism. This type of inflammation is typical for modern lifestyles and is associated with fatigue, delayed regeneration, and an increased risk of lifestyle diseases.
For better guidance, medicine uses laboratory indicators that help detect inflammation even when it is not obvious:
The most frequently monitored indicator is CRP (C-reactive protein), which increases in the blood during acute inflammation. Another value is sedimentation, which shows how quickly blood cells settle in a test tube (this process is faster during inflammation). A more detailed view of immune activity is provided by the differential blood count, which not only assesses the total number of white blood cells but distinguishes their individual types and representations. This enables a better estimation of the type of inflammation or stress the organism is experiencing.
The good news is that inflammation can be reduced or prevented through a healthy lifestyle. Diet plays a major role, representing two groups of factors:
1. Factors reducing inflammatory processes.
These primarily include a varied and natural diet rich in protective nutrients (fiber, omega-3 fats, vitamins, minerals, and antioxidants), which protect cells from damage and help regulate immune responses.
2. Factors promoting the onset and development of inflammation.
The main factors promoting inflammatory processes include:
These listed influences often act unobtrusively, yet their prolonged effect can sustain a persistent low-grade inflammation in the organism.
Equally important as diet is physical activity, overall daily routine, chronic stress, body weight, and smoking.
The goal of health care is not to completely avoid inflammation, because inflammation is a natural and necessary defensive reaction of the organism. It is beneficial when it is short-term and appropriate, for example during wound healing, fighting an infection, or muscle regeneration. The problem arises when inflammation persists long-term or arises without an apparent cause because it can damage the body's own tissues and contribute to the development of chronic diseases. The key is, therefore, to maintain balance in immune reactions, which is significantly influenced by lifestyle. A suitable diet, regular moderate exercise, adequate sleep, stress management, maintaining a healthy weight, and limiting smoking and alcohol help the immune system to respond effectively and not excessively. A properly set lifestyle is often more effective than medications alone, as it addresses the causes of inflammation, not just its manifestations.