The answer to 'why is my flea bites' is that you likely have a flea infestation in your home. Fleas are small, wingless insects that feed on the blood of humans and pets. They can jump long distances and easily infest carpets, furniture, and pet bedding. Common symptoms of flea bites include small, red, itchy bumps on the skin, especially around the ankles, legs, and waistline.
To get rid of fleas, you'll need to treat both your home and your pets. This typically involves thorough vacuuming, washing bedding in hot water, and using flea control products on your pets. In severe cases, it's best to call a professional pest control technician who can provide more intensive treatment and prevention methods.