During pregnancy vomiting, blood in the vomitus and burning throat symptoms are caused by excessive vomiting, during which the mucous membrane in the throat area becomes congested, inflamed, and the local capillaries rupture. Frequent vomiting and irritation of the throat by stomach contents can also lead to inflammation of the tissues in the throat area. For this condition, you should pay attention to control your eating habits properly, try to eat some light and easy-to-digest food, avoid too acidic, too sweet and too spicy and stimulating diet, eat less and more meals, chew and swallow slowly. If the symptoms are too serious, you can go to the obstetrics department of a public hospital and take appropriate medication under the guidance of a doctor.