My mom got mean, why it’s happening?

I’ve noticed that since a few months ago, when I moved back with her, my mom has became toxic, mean and difficult to be around, I’ve seen it could be dementia, menopause or she doing it purpose, I literally feel uncomfortable, stressed, walking on eggshells when she is around me, she was never like that before, so this is concerning for me, what has she changed, I’m 23, she 47?

My mom got mean, why it’s happening?
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