It depends on what you are eating. If you use vegetable oils, switch to avocado, coconut, or olive oil, or better yet, cook with butter, lard, tallow, or bacon grease.
Don’t eat so much that you become miserable. If you find yourself losing interest in eating, stop! That’s satiety kicking in. If the mere thought of food gives you a sort of queasy sensation, don’t eat—wait till you are hungry again. Eat to hunger, not to the clock. Make sure you are getting enough salt, and drink to thirst.
I used to swing between constipation and diarrhea when I was a sugar-burner; my bowel has never been better-behaved in my life than since I went keto. I have to say, however, that the pattern of bowel movements is very different now. For one thing, it doesn’t move every day, and some days it moves several times. This can be disconcerting to people who expect their bowel to move once a day at the same time every day, but it’s perfectly normal.