Changes in hormone levels are thought to be the main cause of PMS/PMT. More specifically, it is the decline in oestrogen and rise in progesterone for up to two weeks before the period starts.
Each month a follicle containing an egg develops and oestrogen levels rise. Once the egg is released at ovulation, oestrogen levels start to decline and progesterone levels start to rise. Progesterone works against oestrogen, and this combination of falling oestrogen and rising progesterone can result in the symptoms listed above.
During the menstrual cycle some chemical levels in the brain fluctuate, such as serotonin. When serotonin levels are low it may cause tiredness and low mood, similar to those symptoms caused by declining oestrogen levels.
At present there isn’t a specific test which can diagnose PMS/PMT, however if you are experiencing the symptoms above and are finding that your quality of life is affected, you can make an appointment to see a specialist gynaecologist here at The Surrey Park Clinic who will assess your symptoms and recommend appropriate solutions. Some of the treatments offered at the clinic could be : A Progesterone coil (Mirena), Oral contraceptives (“The Pill”), Oestrogen replacement, natural progesterone cream or pituitary suppressing injections.