Hypergonadism is a condition where there is a hyperfunction of the gonads. It can manifest as precocious puberty, and is caused by abnormally high levels of testosterone or estrogen, crucial hormones for sexual development. In some cases, it may be caused by a tumor, which can be malignant, but is more commonly benign. Anabolic steroids may also be a major cause of high androgen and estrogen functional activity. Other possible causes include head injuries and brain inflammatory diseases. Hypergonadism may contribute to symptoms such as precocious puberty and abnormal facial hair growth in females. Symptoms
Men and women exhibit different symptoms for hypergonadism. A few of the symptoms that men can experience are increased sex drive, early balding, excessive muscle mass, and acne. Women can have symptoms such as, increased growth of facial hair, deepened voice, coarse body hair, and an irregular menstrual cycle. See also
Hypergonadotropic hypergonadism
Hyperandrogenism and hyperestrogenism
Hypothalamus, pituitary gland, and HPG axis
GnRH and gonadotropins (FSH and LH)
Hypogonadism (hypoandrogenism and hypoestrogenism)


== References ==
Hearing or vision problems may also occur. Abnormally kinky hair is characteristic of giant axonal neuropathy, appearing in almost all cases. As the disorder progresses, central nervous system becomes involved, which may cause a gradual decline in mental function, loss of control of body movement, and seizures. Treatment
See also
Polyneuropathy in dogs and cats

References
This article may incorporate some public domain text from The U.S. National Library of Medicine

External links
Giant axonal neuropathy at NLM Genetics Home Reference
GeneReview/NIH/UW entry on Giant Axonal Neuropathy