Hello,
Nausea and 
vomiting while smoking cigars could be due to various factors such as inhaling the smoke, the quality and quantity of cigars, and individual sensitivity to tobacco. Inhaling cigar smoke can irritate the stomach and cause nausea and vomiting. Cigars also contain high levels of 
nicotine, which can cause nausea and 
dizziness, especially if inhaled. Additionally, cigars can contain other harmful chemicals that may cause similar symptoms.
Gastritis or other stomach problems are also associated with smoking. E should check it out with gastroenterologist. It is important to note that smoking cigars can also have long-term health effects, such as an increased risk of cancer, 
heart disease, and respiratory problems. Quitting smoking is the best way to prevent these health issues, however, this remains your own choice.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Albana Sejdini, General & Family Physician