Wow, I didn't realize that was related to ADD. I don't have as many hypersensitivities as some have listed here, but there are a few things that I just can't stand.
One of them being popsicle sticks touching my teeth in any shape form or fashion. Heaven forbid the thing scrapes my teeth. I can't stand it. Even as I type that, my teeth are hurting from the thought and I am trying not to shudder. Also, when someone writes with a pencil and the wood is down over the lean on one side...the scraping noise of it is horrible! If I'm the one holding the pencil, shivers will run up my spine! Ugh!
I have five small children and often they all come running up to me crying and speaking at one time. I'm trying to understand them, but then all of the sudden, I can't really hear them anymore. It's like I'm listening to static. Its unintelligible, and it isn't five sources of noise, but one. My brain just can't accept it and I get fighting mad. Not the normal, this is just too much chaos mad, but to the point that I want to go nuts on my own babies! (Not hit them or anything that terrible but I tend to start yelling and screaming and just acting like a maniac!)
Sensory issues for my mom, myself, my 2 children have ranged from simple "tags in clothes" to complicated "overload" of external stimuli. Tags easily get removed...External stimulus however is a bit more complex such as the hypersensitivity of being touched/hugged, sounds, textures of food, large social settings, too many people, too much movements etc.
Somehow it seems that these conditions are overlooked or mistaken for panic attacks, social or general anxiety, phobias, perhaps even ADD/ADHD which is why the "Research" and progress towards making the link or clarification of the connections of these sensory sensitive conditions is so crucial. Often wondered if its possible for these things to somehow be related to high functioning broad spectrum disorders such as Aspergers/Autism? Since those are so broad with a wide umbrella of relevance many similarities of symptoms, seemingly so, they form a pattern which emerges in an analysis trending sort of way. This opinion is hopefully along the current studies or researchers line of thought.
Reading "Too Loud, too bright, too fast, too tight"by Sahron Heller Phd and "Driven to distraction" by Md's Edward Hallowell and John Ratey, opened my eyes to both confirming information, and the furthering of personal research. Where myself and my children all have ADD/ADHD, Learning Disabilities such as Dyslexia with letters or numbers, processing issues, are Highly sensitive persons, the way of dealing with our individual symptoms vary.
Sometimes we don't go to places that are overstimulating on any particular sensitive day. We avoid foods that texturally are unpleasing. Hugs are usually avoided or cause overload. Movements or touch either are on the "on or off" switch. Basically, each individual deals with it differently. Once you can identify what your sensitive to then you can find what works. With this comes accepting your limitations and pushing forward to learning ways and skills to help you function at your best possible capacity. Don't give up, and remember...you are who you are and only you can become who you want to be...with or without ADD.