There are many causes of right mid-abdominal pain for more than four months, such as female gynecological diseases, liver and gallbladder diseases, colon diseases, gastrointestinal dysfunction and so on. 1. Female gynecological diseases: the phenomenon of hidden pain in the right mid-abdomen of women may be due to ovarian disease, inflammation and other factors, which may be accompanied by fever, urinary frequency, urinary urgency, urinary pain, irregular vaginal bleeding and other symptoms. 2. Liver and gallbladder diseases: liver cysts, chronic fatty liver, liver abscess, gallbladder stones, cholecystitis and other diseases can also lead to vague pain in the right middle abdomen, which can be accompanied by diarrhea, fever, limb weakness, jaundice and other symptoms. 3. Colon diseases: colitis, colon tumor and other diseases can also cause vague pain in the right middle abdomen, accompanied by abdominal pain, diarrhea, blood in stool and other phenomena. 4. Gastrointestinal dysfunction: Improper diet, eating too much cold, spicy and other stimulating foods can cause gastrointestinal dysfunction, which can lead to right abdominal pain. Right abdominal pain for a longer period of time is also seen in other causes, it is recommended to go to the hospital in a timely manner, do not ignore the symptoms, so as not to delay the treatment of the condition.