Reed diffusers are generally safe for humans. They give you the option of having a great fragrance around the home without having to deal with the fire hazards associated with candles.
That doesn’t mean they are flawless, however. Many people ask “Can reed diffusers give you headaches?” It depends on many factors.
First off, go for quality options as the cheap ones use sketchy ingredients. Speaking of ingredients, see if you are allergic to any of them. Lastly, follow the instruction labels.
A lot of the time the reason why people get headaches is that they use too much oil. Just don’t do that.