Thanks for all the replies.

I forgot to mention one more symptom. I tend to get tingled easily on my hands and legs. For example, i can't squat > 3 minutes, my foot will have tingling sensation. Sometimes, my hand will even get tingled or numbed when simply put on top of any object. I tried to see what would happen if i let it be further. The result is i can't move my finger for a few seconds but it'll go away gradually.

I heard there's one disease where our blood vessels are too close to the skin. I don't know what it is called though. Is it possible that i suffer that kind of disease?