Why do you cough up blood? Do you know these 7 main reasons?

When the weather turns cold, many people will often catch a cold. The most common symptom of a cold is coughing. A mild cough is good for the body, as it can cough out foreign objects in the body. However, if the coughing symptoms are severe, you should pay attention, because a severe cough may cause coughing up blood, which is very serious. What causes coughing up blood? Let’s take a look together.

1. Viral infection

Part of the reason is due to viral infection, such as Coxsackie virus, adenovirus, parainfluenza virus, etc., which are all causes of viral infection.

2. Bacterial infection

Patients with blood in sputum must pay attention. The cause of your illness is likely to be bacterial infection, such as streptococci, staphylococci and pneumococcus. Among them, group A group B streptococcus infection is the most serious and can lead to purulent lesions in distant organs, which is called acute septic pharyngitis. If the cough and blood in the sputum are caused by bacterial infection, you should go to the hospital for treatment as soon as possible to prevent it from further developing.

3. Environmental factors

Environmental factors are also the reason why coughing up sputum can cause blood. For example, high temperature, dust, smoke, irritating gases, etc. These adverse environments will irritate our throat, causing severe coughing and blood in the sputum. This situation is not serious and can be stopped by properly changing the environment.

4. Pathogenic microorganisms

Pathogenic microorganisms include bacteria, viruses, spirochetes, rickettsiae, etc., which can cause acute pharyngitis and other diseases in our body. Pathogenic microorganisms can come directly from the air and diet, or indirectly from blood circulation and lymphatic circulation.

5. Climate and seasonal factors

Winter is the season when bronchial and asthma diseases are prevalent and relapse for many people. This is because the cold causes the blood vessels in the pharyngeal mucosa to contract, and the number of phagocytes decreases, thereby reducing local resistance. Moreover, the dry climate in winter will affect the secretion of pharyngeal mucus and ciliary motility, reduce the cleaning and humidifying effects of the air, and directly cause irritation and damage to the pharyngeal mucosa.

6. Physical or chemical stimulation

The reason for coughing up blood in sputum may also be due to talking too much, or liking to eat spicy and hot foods, or excessive smoking and drinking. In addition, air pollution such as chemical gases and dust can damage the pharyngeal mucosal epithelium and glands, destroy the local defense system and cause blood in sputum.

7. Systemic diseases

People with some systemic diseases may also have blood in their sputum, such as rheumatic fever, heart disease, anemia, nephritis, diabetes, bronchitis, emphysema, tuberculosis, cirrhosis and digestive system diseases. These diseases can cause malnutrition, constipation, etc., which can lead to a decrease in overall body resistance and impaired blood circulation in the pharynx, and then cause acute pharyngitis.