The two main causes for this condition are sudden impact due to fall, and coccydynia caused by childbirth pressure in women. Other ways that coccydynia develops are partial dislocation of the sacrococcygeal synchondrosis that can possibly result in abnormal movement of the coccyx from excessive sitting, and repetitive trauma of the surrounding ligaments and muscles, resulting in inflammation of tissues and pain. Diagnosis
A number of different conditions can cause pain in the general area of the coccyx, but not all involve the coccyx and the muscles attached to it. The first task of diagnosis is to determine whether the pain is related to the coccyx. Physical rectal examination, high resolution x-rays and MRI scans can rule out various causes unrelated to the coccyx, such as Tarlov cysts and pain referred from higher up the spine. Note that, contrary to most anatomical textbooks, most coccyxes consist of several segments: fractured coccyx is often diagnosed when the coccyx is in fact normal or just dislocated at an intercoccygeal joint.A simple test to determine whether the coccyx is involved is injection of local anesthetic into the area.
Other studies have shown prevalence rates in Brazil of 9.9%,
Egypt 13.49%,
Romania 5.1%,
Turkey 12% where higher rates were seen in those with poor socioeconomic conditions,
and just 1% in school children in Hong Kong. In 1963, one school health clinic reported features of pityriasis alba in two fifths of their children. History
It was first described in 1923. Having been known under a variety of names, the term Pityriasis alba, coined in 1956, has stayed. See also
Leprosy
List of cutaneous conditions
Vitiligo which, by comparison, causes total loss of skin colour or on the face and tends to occur around the mouth and eyes. References


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