Try to grab something or pinch. If the base of your thumb hurts and you struggle to move your thumbs, you may be suffering from De Quervain's Tenosynovitis. A condition that affects the tendons between your thumb and wrist, De Quervain's Tenosynovitis is also called Mama Thumb or Gamer’s Thumb. Dr Teh Kok Kheng and Ms Nor Haryanny from Sunway Medical Center explain this painful condition and how therapy can help.