Alocane typically starts numbing pain within 30 to 60 minutes of application. The active ingredient is 4% lidocaine, a topical anesthetic that blocks pain signals from nerve endings in the skin. How quickly you feel relief depends on the type of burn, the condition of your skin, and how much you apply.
What Happens After You Apply It
When you spread Alocane gel or spray on a burn, the lidocaine needs time to absorb through the outer layers of skin and reach the nerve endings underneath. For intact skin, this process takes roughly 30 to 60 minutes before you notice meaningful numbness. On a burn where the top layer of skin is already damaged or blistered, absorption happens faster because there’s less of a barrier between the medication and the nerves. A raw, open sunburn will generally respond more quickly than skin that’s only mildly pink.
Once lidocaine reaches the nerve endings, it works by physically blocking the tiny channels that nerves use to send pain signals to your brain. Think of it like plugging a doorway: the nerves are still there, but the pain message can’t get through. This effect is temporary, which is why you may need to reapply.
How to Get the Fastest Relief
Clean the burned area before applying. Dirt, sweat, or leftover sunscreen can slow absorption. Apply a thin, even layer rather than a thick glob. A thicker application doesn’t speed things up significantly, and using too much lidocaine over a large area increases the chance of side effects.
If you’re using the spray version, let it dry before covering with a bandage or clothing. Covering the area with a sterile bandage after it dries can actually help, since occlusion (trapping the product against the skin) enhances absorption. Warm skin also absorbs topical medications more readily, which is one reason a fresh sunburn that’s still radiating heat may respond a bit faster.
You can reapply Alocane up to 3 to 4 times per day. Don’t exceed that. If the pain returns between applications, cool compresses or aloe vera can bridge the gap.
How Long the Numbness Lasts
A single application of Alocane generally provides relief for one to several hours, though this varies. Burns that are more superficial, like a typical sunburn where the skin is red and dry but not blistered, tend to feel better for longer stretches as the burn itself heals. Deeper or more painful burns with blistering may break through the numbing effect sooner, requiring more frequent reapplication within that 3 to 4 times daily limit.
Which Burns Alocane Is Designed For
Alocane is intended for first-degree burns and mild second-degree burns. A first-degree burn is what most sunburns look like: red, dry, painful skin without blisters. A superficial second-degree burn goes a bit deeper into the skin and produces blisters, moisture, and more intense pain. Both types heal on their own, and Alocane can help manage the discomfort during that process.
Deep second-degree burns, third-degree burns, and any burn that covers a large area of the body are a different situation. Deep burns may actually hurt less than superficial ones because the nerves themselves are damaged, but they require professional medical treatment. Burns on the face, hands, feet, or joints also need specialized care regardless of depth. Alocane is not a substitute for medical treatment on serious burns.
Side Effects to Watch For
Most people experience no side effects beyond mild skin irritation, redness, or dryness at the application site. These are common and not dangerous. The more important concern is using too much lidocaine over too large an area. Because burned skin absorbs lidocaine faster than intact skin, applying generously across a large sunburn increases the amount entering your bloodstream.
Signs of too much lidocaine absorption include headache, unusual fatigue, nausea, rapid heartbeat, dizziness, or a bluish tint to the skin or lips. That bluish color indicates a rare condition where the blood’s ability to carry oxygen is impaired. If you notice any of these symptoms, wash the product off immediately and seek medical attention.
Safety for Children
Alocane is labeled as safe for adults and children 2 years and older. For children under 2, you should consult a pediatrician before using it. Children have a higher ratio of skin surface area to body weight than adults, which means they absorb proportionally more of any topical medication. Stick to small amounts on small areas, and keep the product out of children’s reach.