Why do I feel dizzy when I reach up high for something?

I can’t exactly recall when this first started happening but I know I’ve experienced it for awhile. I have noticed that when I reach up high for something (reaching for the string on the ceiling fan or reaching for a high cabinet for example) I get very dizzy for a few seconds even after I have completed the task. It’s not a huge concern but it does stir my curiosity a little. Is this a common occurrence with most people or is it just me?