Just found out I lost two kgs after being sick for the whole weekend due to weather change and stuff.

I'm feeling so down and sad enough to make a thread looking for help for this issue. Any of you who has experience, weekly healthy meal, what to eat or any solution that would be helpful please share in this thread. Thank you!

Eat carbs

Eat meat

Eat more snacks, even when you're not hungry.

Lift

Eat more than you usually do, like double or triple times more

it depends what you want

if you want to gain weight that will stay there you need to workout, muscles are heavier than fat.

Eat a usual balanced diet of water/fruit/veg/carbs but include some calorie dense, nutritious food like:

Greek Yogurt (high in fat/sugar/Protein)
Granola
Nuts/Peanut Butter
Avacardo
Meat.

Eating dense food is a more comfortable way of gaining weight as opposed to forcing 2-3x as many meals in a day which could make you feel drained and pretty bad.

Unless you really want to gain back those 2kg really quickly then you should not change your diet at all. You will eventually get back to the weight you were by eating the same as you did before you were ill, if you start adding extra food to your diet then you may get into the habit of eating the extra as part of your normal diet and put on more than just 2kg.

Stop masturbating

Get older
Don't try to gain weight if you are young, it will backfire later
Normally, men get progressively heavier starting in mid-20's
Enjoy being skinny and young!

'Eating snacks' doesn't change anything, for me at least

2kg isn't that much. If you've recently been ill then your body needs energy, just eat a few hundred more calories a day for the next couple weeks. If it was fat you will gain it back slowly, if you're worried it was muscle then head to the gym and lift some weights.

Some of you are misunderstanding (because I didn't tell it clear either).

I'm a skinny person. I have suffered from eating disorder for the longest time of my life and my actual weight is embarrassing. My weight is too low for my height.

Me too

Eat McDonald's and drink beer all the time.

Couldn't binge eating potentially be a trigger?

Try snacking on nuts

In that case the only thing I could suggest would be to gradually increase your portion sizes over the next couple of months, don't try and binge eat or start eating lots of rubbish because that obviously isn't healthy either.