If you are in this category of laziness, you should at least know your BMI. Check it once a year to see how it's doing and then do not worry about it if is reasonable.
People might be telling you that you are too thin, but it really them that are too fat.
The tips for weight gain are almost the same as for weight loss. Please go here:
https://www.nhlbi.nih.gov/health/educational/lose_wt/BMI/bmicalc.htm
and check your BMI. Once you know this information, you can know how much you need or want to gain.
I will be happy to give you some help if you would like some after checking that number.
thanks but i m too lazy
If you are in this category of laziness, you should at least know your BMI. Check it once a year to see how it's doing and then do not worry about it if is reasonable.
People might be telling you that you are too thin, but it really them that are too fat.