Dermoplast spray is an over-the-counter topical pain reliever used to temporarily numb skin that’s been cut, scraped, burned, bitten, or otherwise irritated. It contains 20% benzocaine (a local anesthetic) and 0.5% menthol, which work together to block pain signals and create a cooling sensation on contact. While the label lists everyday first aid uses, Dermoplast is perhaps best known as the spray hospitals send home with new mothers recovering from vaginal delivery.
What Dermoplast Treats
The spray is labeled for temporary relief of pain and itching from:
- Sunburn
- Minor burns (kitchen splatter, curling iron contact)
- Minor cuts and scrapes
- Insect bites
- Minor skin irritations
In practical terms, Dermoplast fills the gap between “this hurts but doesn’t need a doctor” and “I need something stronger than an ice cube.” It’s designed for surface-level skin injuries where the main problem is stinging, burning, or itching. It won’t treat infections, deep wounds, or anything that needs stitches.
Why Hospitals Recommend It After Childbirth
If you’ve heard of Dermoplast, there’s a good chance it was in the context of postpartum recovery. Perineal pain after vaginal delivery is extremely common, whether from the stretching of an uncomplicated birth, a tear, or an episiotomy. That soreness can make sitting, walking, and using the bathroom genuinely difficult in the first days and weeks after delivery.
Many hospitals include Dermoplast in their postpartum care kits because the spray format lets you apply pain relief without touching tender, swollen tissue. You spray it on the perineal area after using the bathroom or changing a pad, and the benzocaine numbs the surface within seconds. The menthol adds a cooling effect that many new parents describe as one of the few things that actually made those early days bearable. The spray also contains aloe vera and lanolin, which help soothe irritated skin.
One thing worth noting: while some postpartum numbing sprays use lidocaine as their active ingredient, Dermoplast Pain Relieving Spray specifically uses benzocaine. Both are local anesthetics that work similarly, but they are different compounds. If you’ve been told to avoid one or the other, check the label.
How It Works
Benzocaine is a local anesthetic, meaning it numbs only the area where you apply it. It works by blocking sodium channels in nerve cells near the skin’s surface. Normally, when you injure your skin, nerves fire electrical signals to your brain that register as pain. Benzocaine prevents those nerves from generating signals in the first place, so the pain message never gets sent. The effect is temporary, typically lasting anywhere from 30 minutes to an hour depending on the area and how much you applied.
Menthol, the other active ingredient at 0.5%, activates cold-sensing receptors in your skin. It doesn’t actually lower skin temperature, but it tricks your nerve endings into feeling a cooling sensation, which helps override the itch and burn signals.
How to Apply It
The spray format is one of the product’s biggest advantages. You hold the can a few inches from the skin and spray directly onto the affected area, which means you don’t need to press or rub anything against a wound. This is especially useful for burns, raw skin, or postpartum soreness where even light contact hurts.
Clean and dry the area before spraying when possible. Apply in short bursts rather than soaking the area. You can reapply as needed for continued relief, but avoid using it on large portions of your body at once, since benzocaine is absorbed through the skin and higher absorption increases the risk of side effects. Don’t use it on deep puncture wounds, serious burns, or areas showing signs of infection.
Safety Concerns to Know About
Benzocaine carries a rare but serious risk: it can cause a condition called methemoglobinemia, in which the blood’s ability to carry oxygen drops significantly. This is life-threatening. Symptoms include pale or blue-gray skin, headache, rapid heart rate, shortness of breath, and lightheadedness. If any of these appear after using a benzocaine product, it requires emergency medical attention.
The FDA has issued specific warnings about benzocaine products and children. Products containing benzocaine should not be used on infants or children younger than 2 years old. For adults and children 2 and older, the risk of methemoglobinemia is low with normal topical use on small areas, but it increases if you apply the product too frequently, over large areas, or on broken skin that allows more absorption.
People with a known allergy to benzocaine or other “caine” anesthetics should avoid Dermoplast entirely. If you’ve ever had a reaction to a dental numbing agent, check with your pharmacist before using it.
Product Variations
Dermoplast comes in different labeled versions that can cause confusion on store shelves. The “Hospital Strength” and “Pain, Burn & Itch” versions are actually the same formulation: 20% benzocaine and 0.5% menthol, with aloe vera and lanolin as soothing inactive ingredients. The “Hospital Strength” label is marketing language rather than a different product. If you were given one version at the hospital and can only find the other at the pharmacy, they contain the same active ingredients at the same concentrations.