Uncontrollable crying in 8 year old

[lwestraad]

How do I deal with my 8 year old girl, who cries at the least little thing and always seems irritable or unhappy? She is the middle child between an 11 yo girl and 7 yo girl.
I have tried point systems, ignoring the behaviors, praising for handling situations without crying, extra attention, channeling into creative and physical activities (art, dance, singing, piano, sports), etc etc.
She cries at least 5 times a day- usually more like ten. She often yells for myself or her sisters to "stop looking at me" and takes everything very personally. She is also physically sensitive to cold, drafts, dust, clothes (won't wear clothes with tags) and is very particular about the way things feel in general.
She eats very healthy food, better than my other girls, lots of fruits and vegetables.
She is academically gifted, seems to have a photographic memory, and once focused on something like dance or piano, is very tenacious until it is mastered.
She usually can control the behavior in front of strangers and her peers, but is getting worse at that.
She feels like she gets less attention than her sisters.
I am a stay at home mom and none of the children have ever been in daycare.

[Ortarx]

Being middle is tough.  I am the oldest but I get to see a lot of what happens to the middle kids.  Simply in the fact that your first born is your first born and the baby is the baby.  What does she cry about all the time?  Is it because she is being ignored or teased?  Have you asked her why she tells you not to look at her and if so what does she say?  

[jdtm]

Some of the behaviours you described are similar to those of anxiety disorders.  I might suggest you google the term "childhood anxiety" to see if the description is similar to that of your daughter.