“What causes nausea everyday?”

Too many possible causes, but in someone who is otherwise healthy and without weight loss or anemia, anxiety is a frequent cause. Most causes of nausea are not GI related. Excessive marijuana smoking has been associated with nausea and vomiting (cannabis hyperemesis syndrome).

Multiple causes. Not something that can be answered on this site. First, make sure that you’re not pregnant, please.

Most of my patients have nausea because they are not digesting their food properly. You absolutely should get worked up by a GI doctor to make sure there is nothing bad going on, but if everything comes back negative it's probably an enzyme issue where you're not digesting your food properly due to a lack of enzymes being produced. This happens as we age, when we are not eating the best diet in the world or if we are really stressed out. It's very easy to fix however, taking a good healthy enzyme with every meal can help eliminate these symptoms very quickly.