dr. sheila nolan's an expert. she's a from the maria fareri children's hospital at westchester medical center. so, why are ticks trouble? >> so, not all ticks are trouble. certain ticks can carry diseases that they can transmit to people, and those are the ticks that are trouble. >> what sort of diseases can they carry? >> so, it depends on where you live. certain ticks can cause diseases such as lyme disease. another one is rocky mountain spotted fever. and there's lots of other diseases that you see throughout the country, just depends on where you live. >> so, how can we avoid being bitten by ticks? >> so, ticks like to live in wooded areas, long, high, grassy areas. when you're going into those areas, you should wear long sleeves, long pants. you should tuck your pants into your shoes and socks, and wear bug spray, spray bug spray, preferably one that has deet in it. and light-colored clothing is also something good so if the tick is on your clothing or starting to crawl, then you can easily identify it and pi