Suggest Treatment For Joint Pain

dear doctor, My sister is suffering from joints pain from last 4 years. She is just 20 year. old, earliar our family doctor had prescrbd her to have peniduline injection for an year, after taking those injections she was fine for an year, but again from last 6months she is having same pain, this time our doctor advised her to consult any rhemotologist he suspects that she might be having zeronegative arthrits as the test came negative. So please help me about the best rhemotologist in banglre and weather is there any facility availble in coloumbia asia hospital fr the same, i will b very thankfull to you.Regards Masood khan.