Ticks attach themselves sucking blood from your loved one. Hence the reason why your pets scratch so much after they’ve been bitten. And, in some cases, Tick bites cause allergic reactions in humans. But the real problem is Ticks carry insect-borne diseases just like mosquitoes and fleas. According to the CDC, the number of illnesses caused by flea bites tripled from 2004 to 2016. So if you’re dealing with a tick infestation, you need to act fast!