If you have some sort of an infestation in your house, it could be roaches, ants, mosquitoes, or even mice, you should call a professional exterminator or pest control expert to take care of the situation. A lot of people are tempted to try and take care of the infestation by themselves but this usually does not reap great results. People will be able to kill a few rodents or bugs, maybe even a few hundred, but unless they properly exterminate the breeding grounds or kill the eggs, the insects or mice will always come back. Getting a professional to come and help out means that you will not have to worry about the issue resurfacing again.
In some cases you should be able to take care of the problem by yourself. Generally try a few steps such as using a spray or a powder in the problem areas and try to cover up all holes or entrance points. However, if you have done this and the issue continues then you should call a professional pest control expert. A big reason for the infestation persisting can be the fact that the infestation is too large and more bugs are born than killed in a single go, or that there are areas of moisture that the pests are attracted to that you cannot get rid of. In such cases it is always better to call a professional to take care of the job. You might also be stuck with a few of the more elusive types of bugs such as termites or bed bugs. Both of which are very difficult to remove, and in the case of termites, any wrong steps or mistakes can lead to more termites forming. In these situations, it is better to call an exterminator ro do the job.