The short answer
- Don’t combine them. Ointment stops a hydrocolloid from sealing, so it lifts, leaks and can trap bacteria.
- Hydrocolloid (Compeed, DuoDERM, Band-Aid Hydro Seal, pimple patches): clean, shallow, non-infected wounds and blisters; leave on for several days.
- Ointment + ordinary dressing: grazes and cuts that ooze or need checking daily. Plain petroleum jelly works as well as antibiotic ointment for clean wounds.
How hydrocolloid dressings work
A hydrocolloid dressing has a waterproof outer film and an inner layer of gel-forming particles (such as carboxymethylcellulose). It sticks to the dry skin around the wound, absorbs a little fluid and turns it into a soft gel over the wound bed. That keeps the wound moist, which helps new skin cells migrate across, reduces scabbing and pain, and protects against friction and dirt. The white bubble you see is that gel, not pus.
Because the seal depends on adhesion to intact skin, anything greasy (ointments, oils, many creams) stops it working. Antibiotic ointment under the dressing also isn’t needed, because a clean wound doesn’t need antibiotics and the dressing already provides a moist environment.
Which to use when
| Wound |
Best choice |
| Clean, shallow cut or graze, not bleeding |
Hydrocolloid, or thin petroleum jelly + plaster |
| Blister (intact or burst) |
Hydrocolloid blister plaster |
| Graze with gravel or dirt |
Clean thoroughly; antiseptic; non-stick dressing; change daily |
| Wound that oozes a lot |
Absorbent non-stick dressing; hydrocolloids hold limited fluid |
| Signs of infection |
Not a hydrocolloid; see a doctor |
| Deep cut, animal bite, puncture, burn larger than a palm |
Medical assessment |
Applying a hydrocolloid correctly
- Rinse the wound with clean running water; remove dirt.
- Stop any bleeding with pressure.
- Dry the surrounding skin completely; no creams.
- Choose a dressing that overlaps the wound by about 2 cm on all sides.
- Warm it between your hands, apply without stretching, and press the edges down.
- Leave it on until it starts to lift or the gel reaches the edge, typically 3–7 days.
About Neosporin and antibiotic ointments
Neosporin combines neomycin, polymyxin B and bacitracin. Studies of clean minor wounds show that petroleum jelly heals them just as well, and neomycin and bacitracin are among the most common causes of allergic contact dermatitis, which looks like a red, itchy rash around the wound. Antibiotic ointments are best kept for wounds a doctor thinks are at risk of infection. The skin treatments guide compares antiseptics, ointments and dressings.
See a doctor if the wound becomes increasingly red, warm, swollen or painful, has red streaks, pus or a bad smell, or you develop a fever. People with diabetes or poor circulation should have foot wounds checked early. Check you’re up to date with tetanus for dirty wounds.
Frequently asked questions
Can I put Neosporin on and then a hydrocolloid the next day?
Wash off the ointment and dry the skin thoroughly before applying a hydrocolloid; otherwise it won’t stick.
Can I use Neosporin on a catheter-related sore?
Skin soreness from a urinary catheter should be checked by the nurse or doctor managing the catheter, because infection and pressure need assessment. Don’t apply antibiotic ointments in that area without advice.
Do pimple patches work the same way?
Yes, most pimple patches are small hydrocolloids. They absorb fluid from a spot that has come to a head and protect it from picking. They don’t treat deep cysts.
Sources and further reading
CanforaMedicine Guide
