Small scratches can definitely get infected, although they are less likely to get infected than larger, deeper wounds. Even minor breaks in the skin provide an entry point for bacteria and other germs to get into the body and cause an infection. However, there are steps you can take to clean and care for small scratches to prevent infection.
What causes infections in small scratches?
There are a few main ways that small scratches can get infected:
- Bacteria – Common bacteria like staph (including MRSA) or streptococcus can get into scratches and cause infections. Bacteria live on the skin and are more likely to penetrate deeper wounds, but can still get into minor scratches.
- Dirty environments – Scratches that occur in dirty places with more bacteria around like gardens, garages, bathrooms, etc are more prone to infection. Dirt and debris can get into the scratch.
- Failure to clean – Not properly washing out a scratch can allow bacteria already present to multiply and cause infection.
- Other contaminants – Besides bacteria, things like dirt, oils, and other chemicals that get into a scratch can lead to infection and inflammation.
- Picking at scabs – Repeatedly opening up the wound by picking at scabs can let new bacteria in and delay healing.
- Underlying conditions – People with weakened immune systems or conditions like diabetes are more prone to infections in small cuts and scrapes.
Signs of infection
Watch for these signs of infection in a small scratch:
- Increasing pain or tenderness
- Redness spreading from the wound
- Yellow or green pus drainage
- Warmth around the scratch
- Red streaks spreading from scratch
- Fever or flu-like symptoms
Factors that increase infection risk
Certain factors can make a minor scratch more vulnerable to infection:
- Depth – Deeper scratches affect more layers of skin and provide more opportunity for infection.
- Location – Scratches on the hands, feet, and other parts prone to bacteria are more likely to get infected.
- Type of wound – Jagged scratches and puncture wounds are harder to clean out completely.
- Temperature – Warm, moist environments promote bacterial growth.
- Foreign material – Dirt, debris, splinters, etc trapped in the wound can cause infection.
- Age – Young children and elderly adults have weaker immune systems.
- Chronic conditions – Diabetes, cancer, HIV/AIDS, and other conditions impair healing.
- Medications – Drugs like steroids and chemotherapy suppress the immune system.
Preventing infected scratches
You can prevent most infections in minor scratches with proper first aid care:
- Wash hands and clean wound – Use soap and clean water to remove visible dirt and debris. Avoid using hydrogen peroxide which can damage tissue.
- Apply antibiotic ointment – After washing, apply a thin layer of antibacterial ointment like Neosporin to help prevent bacterial growth.
- Cover with a bandage – Covering with an adhesive bandage keeps the wound clean and protected.
- Watch for signs of infection – Check the scratch daily for increasing redness, swelling, drainage and other symptoms.
- Avoid picking scabs – This can reopen the wound and introduce new bacteria.
- See a doctor for signs of infection – Get medical treatment if the wound shows infection signs.
Risk factors for infection
These factors can increase the risk of infections in minor cuts and scrapes:
- Diabetes – High blood sugar levels make it harder to fight off infections.
- Peripheral vascular disease – Reduced blood circulation slows healing.
- HIV/AIDS – Weakened immune system cannot fight off bacteria.
- Skin conditions – Diseases like eczema or psoriasis make skin more vulnerable.
- Medications – Drugs that suppress the immune system raise infection risk.
- Radiation therapy – Treatments can damage skin tissue and defenses.
- Older age – The immune system weakens and skin thinning increases with age.
- Poor nutrition – Vitamin and nutrient deficiencies impede healing.
- Obesity – Excess weight stresses the body and makes wound healing slower.
How to tell if a scratch is infected
Watch for these key signs of an infected scratch or cut:
- Pus – Yellow or green discharge is a sign of infection.
- Swelling – The skin around the wound becomes inflamed.
- Redness – Redness spreads outward from the original scratch.
- Heat – The area feels warm to the touch.
- Pain – There is increasing pain, tenderness, or throbbing.
- Odor – A bad odor comes from the wound.
- Red streaks – Red lines radiate outward from the wound.
- Fever – A fever can accompany a skin infection.
- Lymph node swelling – Nearby lymph nodes may become tender and swollen.
When to see a doctor
Get prompt medical care if a scratch shows any signs of infection. See a doctor right away if:
- Symptoms are worsening or not improving with home care.
- You develop fever, chills, or flu-like symptoms.
- Redness, swelling, or pus drainage spread from the wound.
- You have an underlying condition like diabetes or a weakened immune system.
- The wound shows signs of a deeper or more serious infection.
- The infected scratch is on the face, hand, foot or another sensitive body part.
Treating infected scratches early on can prevent complications like cellulitis, abscesses, or blood infections. People with chronic illnesses should also have minor wounds evaluated promptly to avoid severe infections.
Treatment for infected scratches
Infected minor cuts and scrapes are typically treated with:
- Antibiotics – Oral or topical antibiotics kill the bacteria causing infection.
- Wound care – Keeping the infected scratch clean and covered until healed.
- Incision and drainage – If an abscess forms, it may need to be drained.
- Tetanus shot – A booster shot may be needed if your tetanus immunization is not up to date.
- Blood tests – Testing for blood infections or underlying conditions.
- Antibacterial creams – Prescription topical antibiotics help clear skin infections.
See your doctor promptly if an infected scratch is not improving after a few days of home treatment with antibacterial ointments and bandages.
Some natural remedies may help prevent and treat infected minor wounds when used along with standard wound care:
- Turmeric – Contains antiseptic and anti-inflammatory curcumin.
- Tea tree oil – Has antimicrobial and wound-healing properties.
- Raw honey – Has hydrogen peroxide which kills bacteria in wounds.
- Garlic – Contains antimicrobial allicin compound.
- Salt water – Can be used as a gentle wound cleanser.
- Aloe vera – Soothes inflamed skin and fights infection.
However, be sure to see a doctor if a scratch shows worsening infection signs even when using natural remedies.
Complications from infected scratches
Minor skin wounds can sometimes lead to more serious complications or infections such as:
- Cellulitis – A bacterial skin infection that causes swelling, redness, and pain.
- Abscess – A pocket of pus that develops under the skin.
- Scarring – Deep wounds may heal with a scar if the skin is damaged extensively.
- Blood infections – Bacteria can spread into the bloodstream, especially in people with weakened immune systems.
- MRSA – The antibiotic-resistant staph bacteria is a common cause of skin infections.
- Necrotizing fasciitis – A rare but life-threatening infection that destroys deep tissues, also called flesh-eating bacteria.
Seeking prompt medical treatment for infected scratches can prevent the infection from progressing into a more serious condition.
Preventing scratches from getting infected
You can reduce the chances of your scratches and minor cuts getting infected by taking these precautions:
- Clean wounds immediately with mild soap and running water.
- Apply antibiotic ointment after cleaning.
- Cover with an adhesive bandage or dressing.
- Keep the wound clean and dry.
- Change the bandage daily.
- Watch for signs of infection like redness and swelling.
- Avoid picking at scabs as this can reopen the wound.
- See a doctor for signs of infection.
- Keep up to date on tetanus immunizations.
Taking quick action to care for scratches and watching for infection symptoms can help prevent minor wounds from becoming serious infections.
The bottom line
Even small, superficial scratches, cuts or scrapes can potentially develop infections when bacteria enter the wound. The risk is increased if the scratch occurs in a dirty environment or fails to be cleaned and covered properly.
However, you can lower the chances of infection by promptly washing all scratches with soap and water, using antibiotic ointment, covering with a clean bandage, and watching for signs of infection. Seek medical care if you notice worsening redness, swelling, oozing pus, red streaks, or flu-like symptoms, as infected scratches may require antibiotics or more intensive treatment.