Feeling bloated after a nap can be caused by improper eating or cold, or it can be caused by chronic gastritis, peptic ulcer, intestinal obstruction and other diseases. 1. Physiological reasons: eating too much lunch, eating too much gas-producing food, such as sweet potatoes, radishes, or getting cold during nap time may lead to bloating after nap time. 2. Chronic gastritis, peptic ulcer: chronic gastritis, peptic ulcer has gastric mucosal damage, congestion, edema, ulceration, abdominal pain, diarrhea, dyspepsia, and difficulty in digesting food, leading to bloating symptoms. 3. Intestinal obstruction: intestinal tumors, foreign bodies, intestinal adhesions, intestinal torsion, etc. lead to intestinal obstruction, gastrointestinal contents are blocked from discharging and accumulating in the gastrointestinal tract, which may cause gastric bloating, abdominal distension, nausea and vomiting symptoms. If you feel bloating after a nap, except for physiological reasons, you should go to the hospital to find out the cause and treat it under the guidance of the doctor.