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Dysfunctional uterine bleeding image - Coggle Diagram
Dysfunctional uterine bleeding 
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Causes
The primary cause of abnormal menstruation is a hormonal imbalance which occurs most frequently at puberty and menopause.
Factors that can impact hormonal balance include stress (physical or emotional), rapid weight gain or loss, medications, birth control pills and intrauterine devices (IUDs).
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Uterine polyps- also known as endometrial polyps, these small, soft growths occur inside the uterus. Most uterine polyps are non-cancerous.
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Pathophysiology
Progesterone levels fall at the end of the menstrual cycle, leading to enzymatic breakdown of the functionalis layer of the endometrium
These arteries become the arcuate arteries; then the arcuate arteries send off radial branches which supply blood to the two layers of the endometrium, the functionalis and basalis layers.
This breakdown leads to blood loss and sloughing, which makes up menstruation
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Referring
Khan R, Sherwani RK, Rana S, Hakim S, S Jairajpuri Z. Clinco-pathological patterns in women with dysfunctional uterine bleeding. Iran J Pathol. 2016;11:20–26. [PMC free article] [PubMed] [Google Scholar]
Nalgirkar SP, Vinchurkar SA, Saoji AA, Mohanty S. Yoga as a therapeutic intervention in the management of dysfunctional uterine bleeding: a controlled pilot study. J Midlife Health. 2018;9:8–13. [PMC free article] [PubMed] [Google Scholar]