Why do I have mom guilt anytime I do something for myself?

Anytime I go something nice for myself like, go get my nails and feet done, get my hair done, buy nice smelling perfumes, nice clothes or shoes, even though I my son is well taken care of, healthy and had what he needs, I always get the feeling of “I shouldn’t be doing this. My son needs me.” And it’s not like I’m robbing banks or anything dramatic but I still feel that way,

Why do I have mom guilt anytime I do something for myself?
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