A woman asked the man for nails and found 49 hairs on her head. Is this a kind of witchcraft, and what effect does it have on the man? How to crack it?

Hehe, this is definitely not good. I don't know what kind of technique it is. Most people want your nails, hair, beard and other hairs to connect with you. It is difficult to determine how to deal with these two things alone, and you should need something else afterwards. And you only know these two things, it is difficult to infer the result. You might as well infer from girls' beliefs, religions and nationalities.

Besides, try not to offend her. If you are a girlfriend, be kind to her, which can generally minimize the risk. It's really inappropriate Make it clear to her and get her understanding. Don't make her angry.

If you are just a friend, don't give her these things of your own.

Because I don't know what she does, it's difficult to have a relatively cracked method. But you must do what you are doing, and never do anything immoral. Generally speaking, if you are an honest person, there won't be too many problems.