Re: How to gain weight
Wow! that sounds incredibly serious. I haven't heard of any adult weigh this less. You can't be (by God's grace) healthy if you have a BMI of 12 something. You either are not as tall as 167 cm or not as much underweight as 35 Kgs, it's just physically not possible without a fatal illness. Like Adrasteia said, you would have no energy if you really were that much underweight. AND may I add, any adult with a BMI of 12 would have to be hospitalized right away regardless (if you are at a place where hospitals exist). I suggest you check your scale again.
I will give you an example. Nicole Richie is hardly 5'2" (158cm) and weighs about 85lbs (38.5Kgs). I am sure you have seen her in news and she is scary skinny. It's sad that she is famous for being anorexic. Nicole Richie has a BMI of 15.5 (that's not nearly what you are if you really are that height and weight!).
DO NOT SCARE YOURSELF AND US!!! PLEASE GET HELP..