Wearing hats most of the time may cause hairloss:
It is very fashionable these days to sport head coverings and tight caps. However, because hats can affect the blood flow to the scalp, this may cause hair loss. This is especially true if you wear tight hats. The result of hair loss due to covering your scalp with a hat does take time to make it’s effects known, but once it starts, the pattern of loosing your hair speeds up faster than if you had never started the hat-wearing habit.