In auditory-tactile synaesthesia, certain sounds can induce sensations in parts of the body. For example, someone with auditory-tactile synesthesia may experience that hearing a specific word feels like touch in one specific part of the body or may experience that certain sounds can create a sensation in the skin without being touched.
It is one of the least common forms of synaesthesia. However, some speculate that the common phenomenon of autonomous sensory meridian response (ASMR), in which auditory stimuli or trigger words create a tingling sensation in the body without being touched, to be a form of auditory-tactile synaesthesia, meaning that it could be more common than current statistics imply. (wikipedia)