Editor’s note: This story is republished in full from South Texas Health System with permission. It was originally published on June 18, 2026.
Plus, how long is too long for a wound to heal?
Most of the time, our bodies act as incredible self-healing machines, and it takes little more than a few days to repair a minor cut, scrape or puncture. However, if infection sets in, a minor injury can quickly escalate into a serious health issue.
Understanding exactly when to seek treatment for an infected wound or for a stubborn wound that won’t heal can potentially save you from severe complications. Read on for guidance on identifying the warning signs of infection, when a wound may be chronic, and when to seek medical treatment.
Is this wound getting better or worse?
Knowing how to tell if a wound is healing properly comes down to observing how your symptoms are progressing. A healing wound steadily improves. The pain lessens each day, the swelling recedes, and the redness fades.
An infected wound does the exact opposite: it stalls in the inflammatory phase and progressively worsens.
Recognizing the signs of possible infection
A common question people ask is: how long does infection take to show? Typically, noticeable signs of infection will set in within two to three days after the injury occurred.
Some of the most reliable red flags of infection include the following:
Throbbing pain and localized heat. While mild tenderness is normal for the first day or two, a wound that suddenly becomes hot to the touch and still throbs days after the initial injury is a clear indicator of possible infection.
Pus. A yellowish, odorless coating over a wound that’s shrinking and feeling better is normal. However, if the wound is still painful and emitting pus – a thick fluid that can be white, yellow or even green and typically has a foul odor – infection is likely.
Possible warning signs of spreading infection
Once a cut or scrape becomes infected, the bacteria will attempt to spread beyond the initial injury site. Be aware of these critical warning signs:
Spreading redness (cellulitis). Some redness is part of the natural healing process, with normal inflammation and redness staying confined to the immediate edges of the cut (usually less than half an inch). Cellulitis, on the other hand, is a deeper skin infection where the redness rapidly expands, often by the hour. The affected skin will feel tight, swollen, very warm and extremely tender to the touch.
Red streaks moving away from the injury. One of the most urgent signs of spreading infection from a cut is the appearance of red streaks moving away from the injury site. This means the infection may have entered your lymphatic system and is traveling toward your lymph nodes. This is an emergency that requires immediate medical attention.
Treating an infected wound
For mild to moderate infections, a doctor will likely prescribe a course of oral antibiotics. Keep in mind that it’s important to finish the entire prescription, even if the wound looks completely healed halfway through, to prevent the development of antibiotic-resistant bacteria.
To manage a minor infected scrape at home, gently wash the area with mild soap and warm water. Apply a warm compress to encourage blood flow and drainage, and use an over-the-counter topical antibiotic ointment. Keep the wound covered with a sterile bandage and change it daily.
Seek prompt professional medical help if:
- The redness is expanding rapidly
- You experience red streaking (lymphangitis)
- The wound is on your face, near your eyes or over a major joint
- You cannot thoroughly clean dirt or debris out of the wound
- The wound was caused by an animal or human bite
- You develop systemic symptoms (like fever or chills)
When wounds won’t heal: Recognizing a chronic wound
A wound is considered to be chronic if it fails to improve within a 4- to 12-week timeframe*. Chronic wounds often itch, “weep” (leak fluid), and smell unpleasant. The lower legs and feet are common areas for chronic wounds to develop.
Chronic wounds affect about 6.5 million people in the United States, according to the National Institutes of Health. The following can put people at risk for developing a chronic wound*:
- Having diabetes
- Immobility or inactivity (this can lead to wounds known as pressure ulcers or pressure sores)
- Suffering a severe burn
- Having a circulatory condition like peripheral artery disease (PAD)
- Having a traumatic injury
Getting help for wounds that won’t heal
When a wound becomes chronic, you may need specialty treatment. For example, a non-healing wound may benefit from regular dressing changes by trained healthcare professionals, who will clean the wound carefully using tools to remove dead tissue and debris (a process known as debridement).
Some advanced wound treatment options include:
- Negative pressure wound therapy, which uses a pump to draw fluid from the wound.
- Skin grafts, which involve skin from another part of the body being transplanted to the wound.
- Hyperbaric oxygen therapy, where the patient is placed in a hyperbaric oxygen chamber to breathe in 100% oxygen. This increases the amount of oxygen in the blood, helping the body accelerate healing and fight infection.
Award-winning wound care, right here in the Rio Grande Valley
The Wound Healing Center at South Texas Health System Edinburg provides outpatient healing services for chronic wounds, including the advanced treatment methods described above.
The Wound Healing Center is a recipient of the 2025 Center of Distinction Award by Healogics®, the nation’s largest provider of advanced wound care services. The award signifies outstanding clinical outcomes for 12 consecutive months and a patient satisfaction rate exceeding 92%.
Prevention is the best medicine
The easiest way to help a wound heal as quickly as possible is to keep it from becoming infected. Proper infection prevention begins the moment the injury occurs:
- Wash immediately: Rinse the wound under cool, running water. Use mild soap to clean the surrounding skin, but avoid getting soap directly inside a deep cut.
- Skip the harsh chemicals: Avoid using rubbing alcohol, hydrogen peroxide, or iodine on open wounds. These harsh solutions can damage healthy tissue and actually delay healing.
- Keep it moist and covered: Apply a thin layer of petroleum jelly or an antibacterial ointment to keep the wound bed moist, which promotes faster skin cell regeneration. Cover it with a clean adhesive bandage.
- Practice good hygiene: Always wash your hands thoroughly with soap and water before and after changing your bandages.
*National Institutes of Health
Source: South Texas Health System.
