Why might the thought of bed bugs produce more anxiety in people than insects that carry diseases like ticks or mosquitoes?

Because we are in our beds everyday and that's our place to sleep.

Explanation:

You see for mosquitoes and ticks, you know you can treat a mosquito bite with some medicine and you can pull a tick off yourself and kill it. But for your bed (or wherever you sleep), you're concerned about what diseases and little bed bugs are going to get on you and that definitely causes anxiety.

you can pull a muscle   or fracture something