When I exert a little force, the muscles in my chest feel pulled and painful.

Sometimes, without knowing why, our bodies will develop some diseases and discomfort symptoms. In fact, any discomfort symptoms may be lurking some disease. For example, some people in daily life will feel pain in a tendon in their chest if they exert a little force. If this happens and you don't have heart problems, it is most likely caused by excessive exercise, leading to inflammation of the chest fascia. If not, it may also be a respiratory infection.

Respiratory tract infections

The common cold is generally a type of upper respiratory tract infection. The main symptoms of upper respiratory tract infection are fever and cough. Symptoms such as chills and muscle aches may also occur. Most patients will feel a burning sensation in the nose and throat before the onset of the disease, followed by symptoms such as nasal congestion, sneezing, and runny nose. This disease can occur in any population, at any age, and in any season.

The main cause of upper respiratory tract infection is due to infection of the nose and throat. The M cells in the adenoid lymphoepithelial cell area contain receptors. The virus adheres to the receptors and reaches the posterior nasopharynx with the help of mucociliary activity in the nasal cavity. At this time, the virus often takes the opportunity to multiply and spread forward. The increase in inflammatory mediators, interleukins, histamine, and the involvement of nerve reflexes and immune responses will lead to the onset of upper respiratory tract infection.

The pathological changes of upper respiratory tract infection are generally related to the virulence of the virus and the scope of infection. The respiratory mucosa becomes edematous, congested, and repairs rapidly, and normally does not cause tissue damage. Different viruses can cause different degrees of cell proliferation and degeneration. The destruction of the nasal mucosal cilia often lasts for about 2 to 10 weeks. When the infection is severe, the sinuses, Eustachian tubes and middle ear canals may become blocked, which may lead to secondary infection. Upper respiratory tract infections often occur when people's resistance is reduced, such as when they catch a cold, are tired, or are caught in the rain. Viruses and bacteria that already exist or invade from the outside will take this opportunity to multiply rapidly and in large numbers, leading to infection. Symptoms such as bronchitis, pneumonia, sinusitis, acute myocarditis, nephritis, and rheumatic fever are usually secondary.

In short, since upper respiratory tract infections are transmitted through saliva, droplets, and contaminated utensils containing viruses, everyone must be vigilant in daily life and pay attention to preventing upper respiratory tract infections. At the same time, we should strengthen physical exercise, improve our own resistance, and avoid the invasion of viruses or bacteria due to low resistance, which may lead to upper respiratory tract infections.