If you are near the beginning of your weight loss journey, don't be tempted to quit because of the scales. If you see a gain one week, and get discouraged, it's normal. This is my weight loss graph over the last 30 days, as you can see there are many gains but I stuck to my plan and turned them right back into losses. I saw that lowcal weighed daily and I thought it was a great idea for me personally, if you see a gain one day, it motivates you to be more strict with yourself the next day (not for everyone though)
ScoobaSteve says, you can do it