vellicate

Verb

• 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
    

• touch (a body part) lightly so as to excite the surface nerves and cause uneasiness, laughter, or spasmodic movements

Related words

• Synonyms: 
  pinch , tickle , titillate