Every time you have a menstrual gum pain may be due to hormonal disorders, but also due to diseases such as mouth ulcers. 1. Gingivitis: women in the menstrual period, due to the body’s hormonal fluctuations, if the teeth have calculus accumulation, may lead to localized gum redness and pain. It is necessary to carry out supragingival cleaning after the end of the menstrual period. 2. Mouth ulcers: Mouth ulcers may be caused by heredity, low immunity, mental stress, improper diet and other factors. If there are ulcers at the gums with surrounding congestion and swelling, the pain may be aggravated every time you menstruate. There are many reasons why a patient may experience gum pain with every period, so you can visit the hospital and find out the cause.