Carpometacarpal (CMC) Osteoarthritis (OA) Quiz Do you experience discomfort when pinching, gripping, removing jar lids or turning doorknobs? Yes No Sometimes Do you feel pressure or pain with movement of your thumb? Yes No Sometimes Do you feel a grinding sensation at the base of your thumb when flexing or extending? Yes No Sometimes Do you have stiffness, swelling and loss of strength of the thumb? Yes No Sometimes When your thumb is at rest, do you experience pain? Yes No Sometimes Do you have prior trauma at the base of the thumb joint? Yes No Sometimes Email my result to the following email address: If you are human, leave this field blank.