Your doctor will provide instructions on how to correctly use Alscab Soap and the appropriate amount to use To ensure proper usage refer to the instructions included with the medicine Before applying the soap make sure your skin is clean dry and cool Thoroughly wash your entire body with the soap approximately 814 hours after initial application In most cases a single application is sufficient to treat the condition However if a second application is necessary wait at least 7 days It is possible for itching to persist for a few weeks after treatment This is likely due to an allergic reaction to dead mites and should not be interpreted as a treatment failure The most common side effects include mild burning stinging or tingling at the application site These side effects are usually mild and not experienced by everyone If you have any preexisting skin conditions allergies to medications food or other substances or if you have asthma inform your doctor before using the soap While this soap is generally considered safe consult your doctor if you are pregnant or breastfeeding for their advice