Because bed bug bites affect everyone differently, some people may have no reaction and will not develop bite marks or any other visible signs of being bitten. Other people may be allergic to the bed bugs and can react adversely to the bites.
This is not always the case with bed bug bites since many people have only a very mild reaction to them. For these people, bites will look more like a reddish dot on the skin than a large, swollen bite. Mosquito bites also itch immediately while it takes some time for bed bug bites to begin itching in most cases.
Generally, symptoms from bed bug bites manifest within hours to a few days after being bitten. In some cases however, there are people who get bitten by bed bugs but do not experience any symptom at all. Symptoms from bed bug bites include itchy red bumps, welts, blisters, and clustered bite marks or rash in various parts of the body.
Bed bug bites can itch for quite some time, but they do not always itch, especially at first. Fortunately, if you have bed bug bites there are some natural things that you can do to relieve the itch.
Many people do not react at all to the bite of a bed bug—many bites leave no mark and go completely unnoticed. Unlike those of other insects, bed bug bites may sometimes appear in tight lines of multiple, small, red marks where multiple bed bugs have fed along an exposed area. Bed bug bites can cause itchiness.
On most people, bed bug bites look like itchy red bumps on their body. However, it can be difficult to know if the bite marks have been caused by bed bugs or not. According to the Centers for Disease Control and Prevention (CDC), the symptoms of bed bug bites may not appear for a few days.