irritate - verb

• cause annoyance in; disturb, especially by minor irritations
• excite to an abnormal condition, or chafe or inflame
• excite to some characteristic action or condition, such as motion, contraction, or nervous impulse, by the application of a stimulus

irritate - thesaurus

annoy   bother   chafe   devil   gravel   nark   nettle   rag   rile   vex