If you catch an ant infestation early on, you can often deal with the problem on your own. There is a range of DIY products on the market that will either kill or repel ants. Once ants have established a nest, getting rid of them becomes much more tricky, and many of the off the shelf solutions will be useless to you.
Wherever ants build their nests, the bulk of the structure will be located underground, where it is out of sight and protected. As a result it can look from the surface like you only have a relatively small infestation on your hands. But there could be a lot more going on underground or somewhere else you can’t see. If this is the case, many of the DIY pesticides will only remove the most visible layer of the infestation. As long as the main nest and queen remain, they will have no trouble replenishing lost ants and building out their nest.
If you have any doubt about how large an ant infestation is or how extensively they have invaded your property, calling a professional pest control expert is the best way of being safe. Even if you only have a minor infestation, calling in a professional will make it easy to establish what attracted ants to your property to begin with and therefore how you can prevent them from returning in the future.
Source:
Ant Pest Contol