Flea bites can be very itchy and painful, and can also trigger allergic reactions in humans. While they cannot survive only with human blood, some species still bite humans as well.
Flea bites are usually small, with a central red spot and appear in groups of three or four, or sometimes in a line. Blisters do not form on flea bites, but only on those of bed bugs. Humans are usually bitten on the feet or ankles, but fleas can expand to other areas of the body too, especially on people with dense hair on the legs and chest.
Humans are not the most optimal hosts for fleas, but they can be a secondary option until a better source of food is found. Especially if the flea is really hungry and didn’t had a meal for many days. Most people will be ok, but others can develop serious allergic reactions.
Signs of fleas in your pet include scratching, licking or biting, red patches or bites, hair loss, pale gums and flea dirt.