Flea repellent products are generally not designed for human use because humans are generally not the first choice for fleas to feed.
When humans get bitten by a flea, it is usually by a cat or dog flea whose primary target is their pet.
The closest product designed for human use is probably DEET, which is a general insect repellent usually used to target mosquitoes but will also work for fleas as well.
There are many natural remedies that you may come across on the Internet such as eating garlic, lavender, etc., but you will find that they may not have the desired efficacy.
