For those of you who are unfamiliar with what cupping massage is, 
it's an ancient Chinese therapy that uses suction or vacuum therapy to get deep into the muscles to ease pain and work out knots. Cupping therapy is used to help with pain, help break up scar tissue in the connective tissues and help reduce swelling due to these issues. 

Cupping can be uncomfortable at times.  Please be open with your therapist at all times during your session and tell him/her when you're feeling discomfort that is beyond your pain threshold.  Therapies do NOT have to be painful to be effective.  In fact, painful treatment quite often have a adverse affect and can cause damage to the underlying tissues.  The old saying "No pain no gain" doesn't apply to massage therapy. Every body is different.  Every body has different needs.  Please stay within your comfort zone at all times.  Your body will tell you what is right for you.