Yes, fleas can bite humans. They are most likely to bite humans when their preferred hosts, such as dogs and cats, are not available. Flea bites can cause small, red bumps that are often itchy. In some cases, flea bites can cause an allergic reaction, which can lead to more severe symptoms such as swelling, redness, and hives.
If you think you have been bitten by fleas, there are a few things you can do:
Wash the area with soap and water.
Apply an ice pack to the area to reduce swelling and itching.
Take an over-the-counter antihistamine to relieve itching.
If you have an allergic reaction, see a doctor.