Keep a biscuit box handy at your bedside table. Nibble a biscuit every morning after awakening and before getting out of bed. For the rest of the day,eat small portions of food at a time. Avoid spicy and oily food and other foods which make you nauseous. Food and stomach acid is regurgitated due to a relaxed valve.
Relief is almost the same as for morning sickness.
In addition, eat slowly and avoid lying down after a meal. Don't take strong drinks like coffee and tea. Sip some water or milk to quell the sour taste. Before bedtime, take a warm beverage. Use an extra pillow to discourage regurgitated food reaching your mouth again.