I have read a lot and saw a video where professionals can heat up your house with a machine to 140deg which will kill the bed bugs.They do make bed bug sprays (raid and others) and you can get mattress covers at wallmart. the ones for allergens will do. Don’t forget to seal up zippers. Read you can mix baking soda and water to a paste put it on for an hour or so. Wichazel, st johns wort and lemon juice, aloe and peppermint oil in tub may help relieve itch. Hope this helps.
This pair of bed bug bite photos below show the immediate (left) and next day (right) reaction after feeding a colony of bedbugs from a container in the lab. (That's why they are contained in a small circular area). The hive-like immediate symptoms are replace by dark red rash type reaction the following day with inflammation and less severe redness radiating out to a larger area.
The size of bed bug bites varies with a number of different factors. Bed bugs inject an anti-coagulant along with their saliva when they pierce the skin to take a blood meal. This anti-coagulant is mostly responsible for how a person reacts to the bite and determines the size of the bug’s bite. Since people will have various sensitivities to the bed bug’s bite, the size of the bite will vary, as well. Another factor that influences the size of a bed bug reaction is the number of times a person is bitten. Bite reactions of people bitten many times are also variable, and their response may be either more or less intense as the number of bites increases.