A hymen is perfectly normal and is usually a crescent piece of tissue that encircles part of the opening of the vagina. It may rip or tear during sexual intercourse, but also due to physical activity, injury or illness. If the hymen is intact, it can interfere with the insertion of a tampon and cause pain. Sometimes, the hymen completely or nearly completely covers the vaginal opening. Other times, there is a strand or band of tissue that runs across the vaginal opening. If this strand is there, it can interfere with the insertion of a tampon, causing pain. See a doctor to get this checked out and to ask about having it removed. Another common problem women have with inserting tampons is that they get nervous and tense up. This is especially common if the woman has had a bad experience. The vaginal wall is lined with muscles and, just like any other muscle, can get tense. This can make the insertion of a tampon very uncomfortable and sometimes painful.  Doing Kegel exercises has helped a number of women with tense vaginal muscles. Kegel exercises are a series of exercises which contract and relax the vaginal muscles. You do them exactly as you would if you were stopping the flow of urine and then allowing it to flow again. You can do these exercises anytime and anywhere. Try for three sets of 10 contractions and releases every day. You should replace your tampon as needed. When you are awake, that may be every four to six hours, or more often depending on how heavy your flow is. However, don’t leave a tampon in any longer than overnight. Tampons left in too long increase the risk of TSS. This is a rare infection that has been associated with tampon use. The symptoms of TSS include:  Flu-like symptoms, such as muscle and joint aches or headache. Sudden high fever Dizziness, fainting, or lightheadedness Vomiting A sunburn-like rash Diarrhea If the methods to help reduce the pain of inserting a tampon don’t work, you can make an appointment with your physician or gynecologist to see if there is a problem. For...

TL;DR in Vietnamese:
Xác định màng trinh còn nguyên vẹn hay không. Bạn có căng thẳng khi nhét tampon không? Thay tampon thường xuyên để tránh gặp phải Hội chứng sốc độc tố (TSS). Đến gặp bác sĩ.