The first sign of flea infestation is flea bites on your skin. These bites look like little red spots and are most likely to be on the parts that rub up against your furniture, such as your arms and legs.
Another way to see if you have a flea problem is if you have a pet. It very easy to spot fleas on you pet. One is to brush them with a fine tooth comb. If you see fleas jumping or small black specs(flea poop)then you definitely have a flea problem.
The final way to find out if you have fleas is if you've seen them. Most of the time if you have an infestation you'll know if by little black specs jumping around. A trick to see if you have them is to set a bowl of water and dawn dish soap out, when you wake up in the morning check the bowl. you should see fleas in it. Even if there are only a few in it, its time to find the best flea treatment.
Getting rid of a flea infestation is easier than most bug infestations. The best flea treatment is to drive to your nearest hardware store and buy flea treatment. Usually you'll have to vacuum first and spray treatment on your carpets, let it soak the vacuum again. You'll have to repeat that until your problem is gone. I would also recommend washing all your linens to rid yourself off flea eggs. Also if you have pets to be sure to treat them with flea and tick preventative to prevent infestation.