Free PainBloc24 Pain PenGet a Free PainBloc24 Pain Pen. Pain Pen is ideal for hands, wrists, elbows, necks, feet and small joints. Designed for pain in the hands and small joints related to conditions such as arthritis and carpal tunnel hand strain. PainBloc24 works by deactivating certain nerve fibers that transmit pain signals from the joint to the brain. Apply now for a FREE PainBloc24 Pain Pen in exchange for a public review. You must be resident in the United States of America, Canada, or the United Kingdom.