Your skin will be a bit irritated after hair removal. This is normal. The longer you sugar, the less your skin will react. Be kind to your skin while it's like this.
Skin on the face tends to stay irritated for a couple hours. Skin on the body tends to show redness or tenderness for a day or two at first, depending on your skin sensitivity. The more often you wax, the finer the hair will get, the weaker the roots will get, and the less your skin will be irritated by the hair being removed.
Between sugaring, your at home care is to exfoliate the area you are removing hair. This both helps the hair to come out easier when you do get sugared and helps prevent ingrown hairs. While the hair is absent, any dead skin cells that sit on the skin can work their way into the pore and block the follicle, causing ingrown hairs. Using a sugar scrub on the body area being sugared three to four times a week will help to prevent this problem. You could also use a body brush. A wash cloth or plastic loofah will not do the proper exfoliating needed though.