Suresh
                    
                    
                    
                    
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                        I am a 50 year old male diagonised with Alopecia Areata.Two months back hair started falling from a small area on my head. Now it has grown to the size of a 5 cms circle patch and is growing.Doctor tells me to take a cortisone injection in the Buttocks.  Can anybody tell me its effectiveness and the side effects?