Hiccups after three days may be caused by eating too fast, diaphragmatic spasm or chronic gastritis, which can be treated with life-supportive therapy, physical therapy, medication and so on. 1. Life-assisted treatment: eating too fast and swallowing a lot of air can lead to hiccups for three days and still not stop, you can change the eating habits, slow down the speed of eating. 2. Physical therapy: diaphragm spasm can cause hiccups for three days, you can massage or apply hot compresses to the position of the diaphragm to relieve the spasm. 3. Medication: Chronic gastritis can cause indigestion, resulting in food not being able to be pushed down in time and hiccups occurring after three days. Therefore, you can take drugs to promote gastric power, such as domperidone, mosapride. Hiccups for three days and still can not accurately determine the cause, but also need to be combined with the characteristics of the medical history, other test results in order to make an accurate judgment, it is recommended to consult a doctor in a timely manner, under the guidance of a doctor to clarify the cause of the disease, standardized treatment, to avoid the use of independent medication, delay the condition.