Hi every morning, only on a morning i feel sick after a cup of coffee only been the last few weeks this has been happening why could this be? x

Coffee and sickness: The primary connection between coffee and nausea is that coffee is a stomach irritant and can cause stomach upset, including nausea. Some people are more sensitive to this effect than others, and food consumption before drinking coffee can have an effect on stomach-related symptoms. Coffee may also raise blood pressure and cause feelings of dizziness, both of which can also lead to nausea if not treated. In some cases, the beverage can also cause heartburn and diarrhea.