For weight gain u need to follow high protein diet and balanced nutrition and do exercises.
What's your weight and height?
Follow schedule
Morning tea
Breakfast
Midday
Lunch
Evening
Dinner
Bedtime
Water intake 16glasses daily.
Include non veg
Paneer/egg/milk and milk products/soyabean dal and other dals.
Dry fruits.
Vegetable and fruits
Cereals.
Butter and ghee.
Avoid outside foods and packets foods junkfoods.
Next Steps
Includes Every foods in ur diet to gain weight and balanced nutrition.
And exercises is very important.
Health Tips
Setup daily routine and follow.