We all interpret information from the environment around us in different ways. Some people find certain types of input more distressing or distracting than others e.g. touch (tactile input). This discomfort may be particularly present with light touch on the skin, e.g. from a shower spray or being tickled. Unexpected sensory experiences of any kind are also threatening e.g. touching someone from behind. The head is particularly sensitive to touch, which can make hair cutting an uncomfortable and sometimes distressing experience.
Touch is a primary and basic sensory system, so when children are sensitive to touch they may react negatively to touch input e.g. screaming, crying or hitting back. This is because the nervous system is interpreting the stimulus as potentially harmful or dangerous.
It is possible to prepare your child for sensations that they may find threatening; this should help to reduce their response and with time hopefully they will increase their tolerance of difficult tactile situations, although their bodies will continue to interpret them as something they do not like. Not all the strategies below will work for one person so experiment. You may already be doing some of these, if they are working, keep going!