Smoking stomach pain may be related to gastrointestinal muscle smooth muscle spasm, gastrointestinal mucosa continuous irritation and other reasons. 1. Gastrointestinal muscle smooth muscle spasm: usually, tobacco contains more nicotine, nicotine, carbon monoxide, inhaled into the lungs will lead to smooth muscle spasm or contraction, for the gastrointestinal part of the body may cause spasmodic pain. 2. Continuous stimulation of gastrointestinal mucosa: long-term smokers gastrointestinal mucosa will be damaged, easy to produce continuous stimulation when smoking, serious peptic ulcer, affecting daily life. Smoking stomach pain may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.