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How can you tell if a wound is infected? Why do wounds become infected? What should I do if the wound is infected?

author:Dr. Yuan, Department of Infectious Diseases

While everyone is busy preparing dinner in the kitchen, if you are not careful, the blade slips through your fingers, leaving a cut that at first glance seems to be a small wound, but if not treated properly, this seemingly inconsequential small wound can cause serious health problems. Accurately identifying and managing wound infections is essential to maintaining our health. This article will show you how to recognize and respond to wound infections to avoid small mistakes.

How can you tell if a wound is infected? Why do wounds become infected? What should I do if the wound is infected?

Identification of wound infection

Initial identification: alert to common red signals

The first signs of wound infection usually appear as redness and swelling around the wound. If you notice a noticeable red spread around the edges of the wound, this could be a preliminary sign of infection. In addition, infected wounds tend to be more painful than wounds that recover normally, and the pain may gradually worsen over time rather than lessen. This is because the inflammation caused by the infection irritates the surrounding nerve endings.

Advanced identification: Detection of abnormal discharge

A sure sign of wound infection is an increase in secretions, especially the appearance of pus. A healthy wound may have a small amount of clear or slightly blood-streaked fluid as it heals, but if you notice a thick yellow or green pus from the wound, or an unusual foul smell, this is most likely a sign of a bacterial infection. This type of secretion is the body's immune response to infection and involves substances that are formed after the death of white blood cells.

How can you tell if a wound is infected? Why do wounds become infected? What should I do if the wound is infected?

Systemic symptoms: warning of systemic reactions

Wound infections are not limited to local symptoms. In some severe cases, the infection can cause systemic reactions, such as persistent fever and elevated body temperature. If you're experiencing these symptoms, it could be a sign that the infection has begun to spread to other parts of your body. In addition, feeling unusually tired or weak can also be a sign that the body is busy fighting infection.

With the above identification techniques, you can identify if an infection has occurred in the wound at an early stage, so that you can take appropriate measures to avoid more serious health problems.

Analysis of the causes of wound infection

Microbial invasion

The main cause of wound infection is the invasion of microorganisms, especially bacteria. The most common are Staphylococcus aureus and streptococcus, which are usually found on the surface of the skin and can invade wounds once the skin barrier is broken. In addition, fungi and viruses can also be the culprits of infections, especially in individuals with weakened immune systems.

How can you tell if a wound is infected? Why do wounds become infected? What should I do if the wound is infected?

Immune defense mechanisms

The body's immune system is the first line of defense against wound infection. The immune system uses various white blood cells, such as neutrophils and macrophages, to recognize and destroy invading microorganisms. When these mechanisms fail or are suppressed, the risk of infection increases significantly.

Environmental and behavioural factors

Environmental conditions, such as unclean water sources or airborne contaminants, can be vectors of infection. Personal hygiene is also crucial, as improper wound handling or neglect of disinfection steps can directly increase the chance of infection.

Manage and prevent wound infections

Timely and effective wound cleaning: the first line of defense

Proper wound management is key to preventing infection. First, the wound should be immediately rinsed with a clean water source to remove possible contaminants. Clean thoroughly with soap and water, and disinfect with iodophor or chlorhexidine if necessary. After cleaning, the wound should be covered with a sterile dressing to prevent further invasion of bacteria.

How can you tell if a wound is infected? Why do wounds become infected? What should I do if the wound is infected?

Seek professional medical help: when and how

If the wound is red, swollen, discharged, or has systemic symptoms such as fever, seek medical attention immediately. In the case of a serious chronic medical condition, such as abnormal glucose metabolism or increased blood pressure in the systemic arteries, it is recommended to consult a physician even if the wound may seem minor. Your doctor may prescribe antibiotics or recommend further treatments, such as wound debridement.

Daily precautions: Maintain wound health

Constant observation of the wound for changes is crucial. Change dressings regularly to keep the wound dry and clean. Improving hand hygiene in daily life, especially washing hands before and after treating wounds, can effectively reduce the risk of infection. For individuals who experience frequent skin lesions, regular skin care and examinations, especially foot exams, are recommended to prevent potentially serious infections.

How can you tell if a wound is infected? Why do wounds become infected? What should I do if the wound is infected?

These direct and practical suggestions can help readers take the right precautions and coping measures when facing wounds, effectively reducing the risk of infection. With a comprehensive understanding of wound infections and the right ways to treat and prevent them, we can protect ourselves and others from the threat of wound infections.