Many people with a fear of flying confuse flight turbulence with wake turbulence. It's easy to confuse the two because both contain the name turbulence. To make it simple, turbulence is more weather related. It's the bumps you get in flight from flying through clouds,or convective activity from the sun's radiation causing up drafts & down drafts. However, wake turbulence is more mechanical turbulence or man-made. It's caused by the close contact from another airplane. It's similar to what you get from a large boat crossing the path of a smaller boat in the ocean. All airplanes create wake. It starts from the wing tip & spirals downward to 1000 ft. before it eventually dissipate. Wake turbulence can be dangerous if one airplane flies to close to another on takeoff or landing. However, accidents are rare because pilots are trained well in avoiding wake. Air traffic controllers have strict protocols on separation standards for aircraft. The most hazardous wake turbulence comes from small airplanes flying into the wake of a heavy large airplane like a B-767 or anything similar. People with a fear of flying shouldn't worry about wake turbulence. It's not something you would have control over. Remember to trust the industry & pilots are well trained. Also realize that the flight crew taking you on your next trip wants to come home at the end of the day too.