Disturbances in the menstrual cycle can be of various kinds and can be due to a wide number of factors, so it is essential to take a broad, holistic view of health. For persistent problems, or if self-help does not correct matters, do seek professional help.
In order to get relief from painful periods, with cramping pains, a gentle and slow abdominal massage may be needed. Using oils that aid relaxation of muscle spasms, such as Chamomile, Lavender, Lemon Balm or Marjoram, will help a great deal. If massage cannot be tolerated, try using a few drops of one of these oils in a hot compress over the abdomen. Lemon Balm, often called Melissa oil after its Latin name, also has a generally balancing effect on the menstrual cycle and drinking tea from the fresh leaves may be more suitable for longer-term treatment. Rose oil seems to have regulating effects too. Many essential oils have a stimulating effect on the uterine muscles and need to be avoided in pregnancy, or suspected pregnancy —used as above, they may be useful in scanty or irregular bleeding.
Menstrual disorders are an area 3-7 where herbal medicine comes into its own for two reasons: firstly, many herbs have quite significant hormonal effects and, secondly, the holistic.