My MIL told me to forget about taking a shower or washing my hair one month after giving birth or I will be plagued by headaches and rheumatism for the rest of my life. Any truth to this?

It's good to maintain hygiene and I don't know how we can do this in Singapore weather.. If you are worried about rheumatism, consult a Tcm. They won't tell u not to shower

I still showered and washed my hair but incorporated herbal tea concoction created by my confinement nanny

thanks