This process can help determine if your skin is sensitive to light and if you can use the laser device using a specific power intensity on an area. Thoroughly clean, shave, and dry the intended area. Perform a test on a small patch of skin with your chosen setting. Wait 24 hours to check for any adverse reactions such as redness, blistering, or skin irritations. If there are no adverse reactions, you can proceed with the treatment. Remember, higher intensity levels are more effective in removing hair but it may be uncomfortable for people with low pain tolerance. LumaRx advises that for best results, you should use an effective set that you’re comfortable with and that doesn’t have any adverse reactions. However, scenario: you feel like you need to go higher. You’ve already passed the patch test on that level BUT it hurts like hell. Thanks to laser users of yore, we know you can hack this by using a numbing cream. You can use the ones used for tattoos and ablative laser resurfacing treatments. (eg. Numb Master 5% Lidocaine Topical Numbing Cream). Skin sensitivity and pain tolerance are different, and you need to address them separately. Sensitivity is an unexpected reaction (like an allergy) that requires you to hit the brake immediately, whilst pain can be managed and really depends on your tolerance (slash willpower). However, if it really does have a reaction and the irritation does not go away within 3 days, you can contact their team directly. Details are on the package.