@feruze-- Whatever you do, don't scratch! Scratching will make it worse. You might make your skin bleed and cause infections. If you have aloe vera gel at home, preferably the one with lidocaine pain reliever, this is the best treatment for itchy insect bites. You can get it from any pharmacy.
If you can't go to the pharmacy right now, I'm sure you have baking soda at home. You can put some baking soda in your bath water and sit in it for about twenty minutes.
If you don't have baking soda either, apply toothpaste on the bites. It sounds like a funny idea, but it works.