Home treatment can help stop the itching and prevent an infection. You can:

Wash the bites with soap to lower the chance of infection.
Use calamine lotion or an anti-itch cream to stop the itching. You can also hold an oatmeal-soaked washcloth on the itchy area for 15 minutes. You can buy an oatmeal powder, such as Aveeno Colloidal Oatmeal, in drugstores.
Use an ice pack to stop the swelling.
See your doctor if you think the bites may be infected.
How do you get rid of bedbugs?

Bedbugs can be hard to kill. Bugs can hide in cracks and crevices in the mattress, bed frame, and box spring. They can spread into cracks and crevices in the room and lay their eggs. For these reasons, it is best to call a professional pest control company for treatment choices. The usual treatments include:

Heat. Equipment is used to heat rooms to kill the bugs and their eggs. The temperature needs to be around 122F (50C).
Insecticides. Make sure that the product the company uses has been shown to be effective against the bugs you are trying to get rid of.
Do other cleaning steps such as:Vacuum often. Be sure to empty the vacuum after each use. If you use a vacuum bag, seal it and throw it out in an outdoor trash can. If you don't use a vacuum bag, empty the container and clean it with hot, soapy water.Launder things that might hide bugs. Washing and then drying items in a dryer on a hot setting is adequate to kill bedbugs in clothing or linens. Turn the dryer to the hottest setting that the fabric can handle.Use mattress, box spring, and pillow (encasement) sacks to trap bed bugs and help get rid of them. Be sure to follow the directions on the package.
When the bugs are gone, be careful not to bring bedbugs back into your house.