When take bath after hysterectomy?

Varies. Different surgeons give different directions. I allow my patients to shower and or bathe in the tub starting the day after surgery.
Depends. There are quite a few types of hysterectomy. If you had a laparoscopic supracervical hysterectomy you could take a bath right away because you only have small incisions in your abdomen. If you had a vaginal or abdominal hysterectomy, most doctors are going to recommend 10d - 4 weeks. I don't think there's harm in taking a bath sooner rather than later. Keep your wound(s) clean and pat dry.