| Cycle timing | Many adults have cycles around 24-38 days, and variation can happen. | Cycles repeatedly far outside your usual pattern, no period for 3 months without an obvious reason, or bleeding too often. |
| Bleeding length | Bleeding for several days can be expected. | Bleeding that lasts more than 7 days, returns quickly, or keeps disrupting work, school, sleep, exercise, or caregiving. |
| Bleeding amount | Flow can be lighter or heavier on different days. | Soaking through products often, passing large clots, needing double protection, or feeling weak, dizzy, or short of breath. |
| Spotting | Light spotting can happen for some people, especially around contraception changes. | Bleeding after sex, bleeding after menopause, repeated bleeding between periods, or spotting with pain, discharge, fever, or pregnancy concern. |
| Pain | Mild cramps that respond to ordinary self-care can happen. | Pain that is severe, worsening, one-sided, deep with sex, tied to bowel or bladder symptoms, or stops normal life. |