What could cause a period to stop and then start again with bright red blood?

Sometimes, the body's hormones go through changes that can make periods act differently. One possibility is that your period stopped because your hormones were too low or out of balance, and then when they change again, the uterus sheds its lining, leading to bright red blood. Bright red blood is usually fresh blood, meaning it's coming from the uterus now. This can happen in conditions like oligomenorrhea where periods are infrequent, or secondary amenorrhea where the period stops for a while with later return. Other reasons might include stress, weight changes, or other mild issues that change how the lining builds up and comes out. In some cases, this type of bleeding could be a sign of abnormal uterine bleeding, which means the cycle isn't following the normal pattern. Each person is different, so if you see these changes or feel worried, you can use a free symptom checker to better understand your symptoms before speaking with a healthcare provider. They can check your hormone levels and help explain what is happening in your body.