Permethrin 5% cream is applied to cool, dry skin from the neck down, left on for 8 to 14 hours, and then washed off in the shower. It’s the most effective topical treatment for scabies, with cure rates above 90% when applied correctly. The key to making it work is thorough coverage, especially in areas that are easy to miss.
Before You Apply
Start with clean, cool, dry skin. Take a bath or shower, then wait at least 20 to 30 minutes before applying the cream. Your skin needs to cool down completely first. Warm skin absorbs the medication too quickly into deeper layers, which pulls it away from the surface where the mites actually live. You want the permethrin sitting in and on the outer layer of skin, not deeper tissue.
Trim your fingernails short before application. Scabies mites and eggs hide under the nails, and the cream needs to reach those areas. Short nails also reduce the risk of breaking skin if you scratch during treatment.
Where to Apply the Cream
Cover every surface of skin from the jawline down to the soles of your feet. One full tube (30 grams) is typically enough for an average adult. Massage the cream in thoroughly rather than leaving a visible white layer. The areas people most commonly miss are the ones that matter most, because scabies mites prefer warm, hidden spots on the body.
Pay special attention to these commonly missed areas:
- Between fingers and toes, including the web spaces
- Under fingernails and toenails, using a small amount worked beneath the nail edge
- Wrists, elbows, and armpits
- The belt line and waistband area
- Buttocks and the fold between them
- Around the belly button
- Genital area in both men and women
- Soles of the feet, including between the toes
For infants and young children, the cream also needs to go on the scalp, temples, hairline, and forehead, because mites can burrow in those areas in small children. The same applies to elderly individuals or anyone with a weakened immune system. For most healthy adults, application stops at the jawline.
Timing and Wash-Off
Leave the cream on for 8 to 14 hours. Most people apply it at bedtime and wash it off in the morning, which fits naturally into this window. Set an alarm if you need to, because leaving it on significantly longer than 14 hours increases the chance of skin irritation without improving effectiveness.
If you wash your hands during the treatment period (which is hard to avoid overnight), reapply cream to the hands immediately. The hands are one of the most common sites for scabies mites, and any gap in coverage there can undermine the treatment. The same goes for any skin that gets wiped or rinsed for any reason during those hours.
When the time is up, shower or bathe with lukewarm water and mild soap. No special rinse or scrubbing technique is needed.
The Second Application
A second treatment is typically done on day 10 after the first application. This isn’t optional. Permethrin kills live mites effectively, but eggs that were laid in the skin before treatment can hatch in the days that follow. The second round catches newly hatched mites before they can mature and lay eggs of their own. Follow the exact same process: cool skin, full body coverage from the neck down, 8 to 14 hours, then wash off.
A large clinical trial published in The BMJ found that two doses of permethrin cream given 10 days apart produced a cure rate of 91.5% in individual patients and 94.2% across all treated household members. That makes it statistically superior to oral alternatives like ivermectin for classic scabies.
Why You’re Still Itching After Treatment
This is the part that catches most people off guard. Itching does not stop when the mites die. Your skin is reacting to the waste, eggs, and body parts the mites left behind in their burrows, and that allergic reaction can persist for two to six weeks after successful treatment. The rash may even look worse before it gets better.
Continued itching during this window does not mean the treatment failed or that you need to reapply the cream. Unnecessary extra applications just irritate the skin further. If the itching is still intense or worsening after four weeks, that’s when it makes sense to get reassessed, because persistent symptoms past that point could signal reinfestation or an alternative diagnosis.
Common Side Effects
Mild burning, stinging, or tingling at the application site is normal and usually fades within a few hours. Some people notice temporary redness or numbness in the skin. These effects are generally mild and don’t require stopping treatment. Severe reactions are rare but would include significant swelling, blistering, or difficulty breathing.
Cleaning Your Environment
Treating your skin without addressing your surroundings can lead to reinfestation. Scabies mites can survive off the body for a limited time, so environmental cleanup should happen on the same day you start treatment.
Wash all bedding, towels, and clothing worn in the previous three days in hot water. Temperatures above 122°F (50°C) for 10 minutes kill both mites and eggs, so a standard hot wash cycle followed by a hot dryer cycle is sufficient. For items that can’t go in the washing machine, either dry-clean them or seal them in a plastic bag for at least 72 hours, and up to one week to be safe. Mites can’t survive that long without a human host.
Vacuum upholstered furniture and carpets, then dispose of the vacuum bag. You don’t need to fumigate your home or use insecticidal sprays on surfaces. The mites need human skin to survive and don’t live long on furniture or floors.
Treating the Whole Household
Everyone living in the same household should be treated at the same time, even if they aren’t showing symptoms yet. Scabies has an incubation period of several weeks, meaning someone can be infested and contagious before they ever start itching. Treating only the person with visible symptoms while leaving close contacts untreated is the most common reason for reinfestation. Coordinate so that all household members apply the cream on the same night, repeat together on day 10, and do the laundry cleanup simultaneously.