Plantar fasciitis is a painful inflammatory condition caused by excessive wear to the plantar fascia of the foot. The pain usually is felt on the underside of the heel, and is often most intense with the first steps of the day. It is commonly associated with long periods of weight bearing. Obesity, weight gain, jobs that require a lot of walking on hard surfaces, shoes with little or no arch support, and inactivity are also associated with the condition. This condition often results in a heel spur on the calcaneus, in which case it is the underlying condition, and not the spur itself, which produces the pain.

Source: http://en.wikipedia.org/wiki/Plantar_Fasciitis

gladys: wah u like that also can find me here =.="...and why u so understand me ? hahahahahahaa....designer and gamer pulak...not really la...i dont just always sit...i try to spend some time walking during office hour and also at home, cause i know its not healthy to sit everyday.
and im not rich =.=" poor kid here.

Phoenix & Fenta : thanks for the info, will look through it, and i think thats the cause.

bebee: how do u define standing in a wrong position? hahaha...well my shoes...not too big not too small...an usual size for me lor...
hmm....maybe is because i have not enuff sleep everyday? im like just having 6 hours of sleep daily. Maybe body heaty ? will cause the problem also?

Whenever a person says that, he/she lies about it.. It is the same philosophy as a drunk person who claims he/she is not drunk yet...