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Cyts have no definite and identifiable cause. Some result fomr hormonal
disturbance and cause further hormonal and menstrual problems.
If the size of cyst
is significant, causing discomfort in anyways, its advisable to surgically remove it.
If you are in doubt , you may take a second opinion
. You can also visit a homoeopath for the same, homoeopathy works well for cysts.