takes a good week or but it works [SEP] this works takes a good week or but it works like so many others who purchased this i get this rash on my back seasonally and i don t like taking an rx or using rx creams this is very gentle does not dry me out and the lavender scent is actually soothing yes there is a little sulphur smell it s the active ingredient but it s very subtle and goes away fast especially if you follow up with another soap afterward i saw results after a week and my rash is almost completely faded after weeks of using this times a day