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Bad luck doesn't mean it is a hex. A good place to start is to have the person ground and center and clear their own energy, then do some basic shielding to keep out any unwanted energies. Have them do the same thing for their personal spaces, home, place of business, whatever. Heck, if possible getting a friend or too to help with either may be useful too.

We pick up a lot of energetic gunk in the course of a day and well it tends to accumulate. And it can act like a magnet at attract more sludge. It can be like walking in a bubble of ick, depending on how much and how sensitive you are to it. Can cause everything from bad luck to bad moods and tends to self perpetuate. Why, cause bad things are happening, so we tend to get pessimistic and paranoid and believe that bad things are gonna happen, and by believing that bad things will happen we actually unintentionally make them happen.

Thoughts have power. The way we think creates our reality. Think about it this way, if intent+will+energy=magic, well power is another word for energy. There is this idea in bad luck(intent), which we start thinking about because it starts happening more frequently then usual)energy), it keeps happening and we end up expecting it to happen(will), and sure enough it keeps happening.(magic)

Thus the old saying, "Be careful what you wish for, you just might get it." It is possible to 'wish' for bad things as well as good things, and most of the time we don't realize we are doing it.

Do some serious cleansing, and make sure to do maintenance on it regularly along with general shielding, and such thing usually clear up on their own.

Actual hexes, from my experience, are very rare.