First, read the English article below.

Sometimes, a sore vagina is caused by something obvious. If you've recently given birth, or had rough sexual intercourse, that may be the cause. However, vaginal pain with no clear cause should be evaluated by a medical professional. This is especially important if you notice any of the following symptoms:  Vaginal discharge with an unusual color or odor Redness, itching, or irritation Bleeding between periods, after intercourse, or after menopause Any kind of unusual mass or bulge in your vagina Any blisters in or on the outside of the vagina Over-the-counter pain medications usually do not lessen vaginal pain. You will have to talk to your doctor about prescription medications.  The antidepressants amitriptyline and nortriptyline may soothe vaginal pain. Your doctor may prescribe these medications if he or she believes it would help with your vaginal pain. They may cause drowsiness, dry mouth, and weight gain. This is a last resort after ruling out all other causes of vaginal pain Anti-epilepsy medications can also ease vaginal pain, but may cause similar side effects. Vaginal pain can be a symptom of a variety of STIs. Getting tested is important. If you have an STI, the sooner you treat it the better.  Many STIs can be cured with a simple round of antibiotics. If you have an STI, your doctor will prescribe antibiotics to treat the infection. Take all your antibiotics as prescribed. Some STIs, like herpes and HIV, do not have a cure. You will have to talk to your doctor about the best treatment option to keep symptoms and complications in check. Vaginal soreness may be caused by certain cancers, vaginal cysts, or other medical problems. However, most causes are yeast infections, allergy to a laundry detergent, herpes outbreak, endometriosis. Depending on your symptoms, your doctor may want to run a series of tests to rule out such conditions. Talk your symptoms and medical history over with your doctor. He or she will determine what tests, if any, need to be conducted. 

Now, please write a short abstract for it in Vietnamese. Abstract:
Biết khi nào nên gọi cho bác sĩ. Hỏi bác sĩ về việc dùng thuốc. Xét nghiệm sàng lọc các bệnh lây truyền qua đường tình dục (STI). Làm thêm các xét nghiệm khác.