Am 25 yrs old n am only 38kg.I want to gain weight because m underweight.I've tried every medicines n protein drinks but never tend to gain weight,plzz help

I can help you as I have been in your situation before, but I need to know what sort of diet and lifestyle you have at the moment, and if you have been referred to a doctor.
All the best x

Ok Ember,thanks for da response.well am frm India.everyday I get up at around 8:30pm and prepare breakfast.around 10:30 I use to have my breakfast and go to my shop (I own a readymade garment shop)for which I have to walk for 15 minutes.use to have lunch at around 3pm and around 6 or 6:30 I close my shop and again walk till home.prepare dinner and have it at around 10pm.I hope this infos are useful for you to sort out my problem,ill be really gratefull if you could help me to gain weight because I've tried so many things but everything invain.so you can provide me sum useful tips it will be bliss thanks!