With a minor cut or graze, what matters most for how it heals is not the antiseptic you use but three things: stopping any bleeding, cleaning it well with soap and water, and covering the wound instead of letting it dry in the open air. Everything else (which dressing, how often to change it, when to worry) depends on the type of wound.
First, stop the bleeding
If the wound is bleeding, press directly on it with gauze or a clean cloth for several minutes without a break, and don’t lift it every few moments to check. If you can, raise the area above the level of the heart. Most superficial bleeding stops after five to ten minutes of continuous pressure. If blood soaks through the gauze, put another piece on top without removing the first.
Get medical help without delay if the bleeding has not stopped after ten minutes of firm pressure, if the wound is very deep, if you can see fat, muscle or bone, or if it was caused by a very dirty or rusty object.
How to clean the wound, step by step
Once the bleeding is under control:
- Wash your hands with soap and water before touching the wound.
- Remove any clothing or objects that could still be in contact with the area.
- Rinse the wound under clean running water (or saline solution if you have it) to wash away visible dirt.
- Wash the skin around it with soap and water, keeping the soap out of the cut itself.
- Dry it by patting gently with clean gauze, without rubbing.
- Cover it with a dressing or clean, dry gauze.
If while cleaning it you see soil, glass, splinters or any other foreign body that does not come out with rinsing, don’t try to force it: go to a healthcare centre.
What is best avoided
Hydrogen peroxide and surgical spirit have been in home first aid kits for decades, but both also damage the healthy cells the wound needs in order to close, not just bacteria. The fizzing of hydrogen peroxide when it touches the wound is not a sign that it is “cleaning better”: it is the chemical reaction that also harms new tissue. For most superficial wounds, soap and water are enough; if you want an extra antiseptic, chlorhexidine or povidone-iodine are options with less impact on healthy tissue, always used as directed on the pack.
Which dressing to use for which wound
Not all dressings do the same job. The table summarises the most common ones in a pharmacy:
| Type of dressing | When it makes sense | When to avoid it |
|---|---|---|
| Gauze and tape | Small, dry wounds, first 24 to 48 h | Wounds with a lot of discharge |
| Adhesive dressing (plaster) | Everyday superficial cuts and scrapes | Large or deep wounds |
| Waterproof dressing | If the area may get wet (shower, pool, sport) | Wounds that need to stay visible for daily checks |
| Hydrocolloid | Blisters, wounds with mild to moderate discharge, healing phase | Infected wounds or wounds with heavy discharge |
| Hydrogel | Dry or painful wounds with little discharge | Very wet wounds |
The general principle, supported in wound care for decades, is that a wound kept covered in a controlled moist environment heals faster than one left to dry in the air, because skin cells need that environment to move across and close the tissue. That is why, unless you are told otherwise, covering is usually better than “letting it breathe”.
How often to change the dressing
As a general rule, check and change the dressing once a day, or sooner if it gets wet, dirty or comes loose. Each change is also the moment to look at how the wound is doing: if the redness is going down and there is no discharge, it is on track.
Signs it may be getting infected
It is normal for a wound to be a little red and tender for the first few days. What is not normal, and worth watching for, is:
- Redness that increases or spreads around the wound instead of fading.
- Swelling, warmth or growing pain in the area.
- Pus or an unpleasant smell.
- Fever, chills or feeling generally unwell.
- A red line spreading from the wound along the limb.
Do you need a tetanus jab?
It depends on the wound and on when you had your last dose. Wounds with a higher tetanus risk are deep or puncture wounds, those contaminated with soil or faeces, bites, those containing foreign bodies or damaged tissue, and those where medical care is delayed by several hours. If you have a wound like this and can’t remember for sure when your last booster was, or you know it was more than five years ago, tell your doctor or pharmacist: they can assess whether you need a booster dose according to your vaccination record.
When to see a doctor
Go to a healthcare centre instead of treating the wound at home if:
- The bleeding does not stop after ten minutes of continuous pressure.
- The wound is deep, gaping or involves a joint.
- It was caused by an animal or human bite.
- Signs of infection appear: spreading redness, pus, fever or a bad smell.
- You cannot remove soil, glass or another foreign body.
- You have diabetes, a weakened immune system, or take anticoagulants, as these wounds need closer follow-up.
This article is for information only and does not replace an individual assessment by a doctor or pharmacist. Sources: Spanish Ministry of Health: First aid for wounds, MedlinePlus (NIH): How wounds heal, MedlinePlus (NIH): Cuts and puncture wounds, Spanish Ministry of Health: Tetanus, information for the public, Spanish Ministry of Health: Recommendations for the use of Td vaccines.