It depends on the techniques used. Many massage therapists use a form of Swedish massage, which is often a baseline for therapist. In a general Swedish massage, your session may start with broad, flowing techniques that will help calm your nervous system and relax exterior muscle tension. As your body becomes relaxed, pressure will gradually be increased to relax specific areas and relieve areas of muscular tension. Often, a light oil or lotion is used to allow your muscles to be massaged without causing excessive friction to the skin. The oil also helps hydrate your skin. You should communicate immediately if you feel any discomfort so that another approach may be taken.