In the hospital you may be given a portable sitz bath. This sits over a normal sized toilet. You fill a bag with warm water and sit on the sitz bath. The warm water then flows over your perineum allowing for healing and cleansing. You can add medication or herbal preparations at will.
This can be done often through out the day and is a lot easier than getting into the bath tub. Should you not have a portable sitz bath sent home with you, you can generally sit in tub filled 2-3 inches with warm water for the same effect. Or you can order a portable sitz bath for your home.