“How long will it take?” is usually the first question a family asks about a wound, and the answer depends on the wound. A kitchen cut and a diabetic foot ulcer are both wounds, but one closes in days and the other can take months.
What every wound has in common is the process. The body repairs skin through the same four overlapping stages, whatever caused the damage. Knowing those stages helps you judge what you are seeing on each dressing change, and spot the point where healing has stopped moving forward.
What are the four stages of wound healing?
Stage 1: bleeding stops (minutes to hours)
Straight after an injury, blood vessels narrow and platelets gather to form a clot. The clot plugs the wound and becomes a scaffold for everything that follows. With most small wounds this is over within minutes.
Stage 2: inflammation (roughly the first few days)
The area becomes red, warm, slightly swollen and sore. This is normal. White blood cells move in to clear bacteria and damaged tissue, and the wound may ooze a little clear or pale yellow fluid. For a clean wound this stage usually settles within about a week.
Inflammation that gets worse instead of settling, with spreading redness, heat, increasing pain, pus or a bad smell, is not normal healing. That points to infection and needs a doctor.
Stage 3: rebuilding (from a few days to several weeks)
The body now fills the wound with new tissue. In an open wound this appears as moist, bumpy, deep pink or red tissue at the base, sometimes described as looking like the surface of a raspberry. That is healthy. New blood vessels grow into it, collagen is laid down, and the edges of the wound creep inwards as fresh skin grows across from the sides.
This is the stage that depends most on nutrition. Building new tissue takes protein, energy, vitamin C, zinc and vitamin A, and a person who is eating poorly can get stuck here.
Stage 4: strengthening (weeks to a year or more)
Once the wound has closed, the work is not finished. The collagen underneath is slowly reorganised and strengthened. The scar starts red or dark and raised, then gradually flattens and fades. Even when fully mature, scar tissue is not quite as strong as the original skin, which is why a healed wound can break down again if pressure or injury returns.
How long do common wounds take to heal?
These are typical times for healthy adults. Age, diabetes, poor circulation, smoking and poor nutrition can all stretch them.
| Wound | Usual time to close |
|---|---|
| Small cut or graze | 1 to 2 weeks |
| Stitched surgical cut (skin surface) | about 1 to 2 weeks, with stitches often removed at 5 to 14 days depending on the site |
| Deeper tissue under a surgical scar | around 6 weeks or more to regain most of its strength |
| Minor burn with no blisters | about 1 week |
| Burn with blisters (superficial partial thickness) | about 2 to 3 weeks |
| Early-stage bedsore, with pressure relieved | days to a few weeks |
| Deeper bedsore | months |
| Leg ulcer or diabetic foot ulcer | often many weeks to months, with proper treatment |
A wound that has not healed in the expected time, or has stopped improving, is often called a chronic or hard-to-heal wound. That label does not mean it will never heal. It means something is holding it back, and that something needs finding.
How do you know healing is on track?
Signs that a wound is moving in the right direction:
- it is getting smaller, even slowly
- the base is moist and pink or red
- the edges are flat and moving inwards
- fluid is decreasing
- pain is easing, or at least not increasing
- there is no bad smell
Signs that it may be stalling:
- no change in size for two weeks or more
- pale, grey, dark or black tissue in the wound
- a yellow or white layer that keeps coming back
- edges that are thick, rolled or undermined
- more fluid, more pain or a new smell
- redness spreading into the surrounding skin
Many wound specialists use a rough rule for slow wounds: if a wound has not shrunk by around 40 percent after four weeks of good care, the plan needs reviewing. You do not need to calculate that precisely. If a wound looks much the same as it did a month ago, tell the doctor or nurse.
How can you track a wound at home?
Memory is unreliable, and wounds change slowly, so a record helps.
- Take a photo at each dressing change, or once a week, in the same light and from the same distance.
- Place a coin or a ruler beside the wound in the photo so the size can be compared.
- Note the date, the amount of fluid on the old dressing, any smell, and the pain level from 0 to 10.
- Show the photos to the nurse or doctor at each visit.
Keep these photos private, in a folder on your phone that is not backed up to shared albums.
What slows healing down?
- infection
- pressure on the wound, especially with bedsores and foot wounds
- poor blood flow, which is common in people with diabetes or vein problems
- high blood sugar
- smoking, which narrows blood vessels
- not eating enough protein and energy
- dehydration
- some medicines, including long-term steroids
- older age, which slows every stage a little
Several of these are things a family can influence directly, particularly pressure, food, fluids and smoking.
Where does nutrition fit?
Food matters most during the rebuilding stage, when the body is making new tissue. A person with a healing wound generally needs about 1.2 to 1.5 grams of protein per kilogram of body weight a day, plus enough energy and fluid, and fruit and vegetables for vitamin C and vitamin A. When a wound is stuck, a doctor or nurse will often ask how the person is eating, because poor intake is one of the common and fixable reasons.
When should you see a doctor?
Get the wound checked promptly if you notice:
- redness, warmth or swelling spreading around it
- pus, a bad smell or a sudden increase in fluid
- a fever, or the person feeling unwell
- the wound getting bigger or deeper
- skin around the wound turning dark or black
- no improvement after about two weeks, or not clearly smaller after four
- any wound on the foot of someone with diabetes
The bottom line
Wounds heal in four overlapping stages, and most small wounds close within one to two weeks while the scar keeps strengthening for months. Larger and long-standing wounds take far longer. The most useful thing a family can do is watch the trend: a wound that is shrinking, pink and less painful is healing, and one that has not changed in a few weeks needs a fresh look.
For reasons a wound may stall, see why a wound may not be healing. For the food side of the rebuilding stage, see foods that help a wound heal and what to eat while recovering from a burn.