tickle, titillate, vellicate -- (touch (a body part) lightly so as to excite the surface nerves and cause uneasiness, laughter, or spasmodic movements)
pinch, vellicate -- (irritate as if by a nip, pinch, or tear; "smooth surfaces can vellicate the teeth"; "the pain is as if sharp points pinch your back")
(TTS Sound)
