Thyroid problems are an increasingly common health concern. This title is a clear and practical guide to symptoms and treatment options for those who have, or think they may have a thyroid related problem. All medical information has been fully revised, and the book is substantially expanded throughout with content covering a wide range of self-help measures, self-tests and questionnaires, resources, advice and an exploration of the links between thyroid and other conditions. Hidden thyroid problems can be a factor in: chronic fatigue; depression; mood swings; weight gain; appetite disorders; menstrual problems; infertility; perimenopause and menopause problems; changes in libido; heart disease; and premature ageing. The thyroid is the "master gland" governing a huge range of vital health functions, and thyroid problems are as common as diabetes problems - but difficult to diagnose.