mood changes

Some cancer treatments lower the levels of sex hormones in the body. Low levels of sex hormones can sometimes cause mood changes. Hormones and mood changes Hormones are natural substances made by the glands of our hormone (endocrine) system. They are carried around our body in our bloodstream. The main male sex hormone is testosterone. The main female sex hormones are oestrogen and progesterone. There is evidence that a fall in oestrogen levels can cause mood changes. This could be due to the cancer treatment, the menopause , or both.  The causes of mood changes can be difficult to assess