Thin and Thinner

I am already thin. Used to be so underweight and it has gone worse. 60kg for a 176cm made me like a walking skeleton in the past. Few weeks ago I weighed again and it had dropped to 59kg. I don't know why this is happening to me.

I have two jeans, a new and an old one. The old jean suits me perfectly while I need a belt for my new one. I found that my old jean is going to be just like my new jean this noon, meaning I am now lower than 59kg. ='(

I am getting thinner. I don't want this. Used a few methods to increase my appetite when I was young but it did not work at all. =/

I really really hate this. God please give me a few more kilograms =D