Stomach pain after drinking beer may be caused by the following reasons: 1. Drinking a large amount of beer, beer is a stimulating ingredient that can lead to damage to the gastric mucosa and stomach pain. 2. Possibly drinking too cold beer, cold is a stimulating factor that can lead to stomach pain aggravated by spasmodic contraction of the stomach and intestines, so both of the above situations can lead to stomach pain. At this time, you should strictly control your diet and avoid contacting stimulating and spicy foods that aggravate stomach pain again. You can take some warm porridge or easily digestible foods to relieve the aggravation of damage to the stomach function and improve the digestive function of the gastrointestinal tract. At this time, you can also add some mucosal protective agents, such as Daxil, and you can also add some acid-suppressing drugs, such as omeprazole, to jointly assist in the treatment of stomach pain. Generally, after about 2-3 days of diet and medication, the stomach pain after beer drinking can basically be relieved. If the symptoms are not relieved and continue to worsen, it is still recommended that the patient should immediately go to the hospital for medical consultation.