Do they occur from birth or develop over time? Can anything trigger them or is it more neuro-developmental?
Just thinking back to the very early days and DD waking at the slight smell of cooking and even at the sound of a teaspoon stirring much needed cups of tea! Certainly by 3 sensitivities to sound we noticeable and she loved soft textures. Later developed dislike of rough textures/clothing. From around 18 months became v fussy with food and disliked certain textures and smells. Nervous around certain flashing lights. Started licking objects/me in or after social situations.