This child is suffering from a chronic infectious or inflammatory problem.
She needs a careful and thorough investigations to rule out the chronic conditions like tuberculosis
, autoimmune problems like SLE, rheumatoid arthritis
, and other chronic conditions by doing appropriate investigations.
Therefore I advise you to get admitted her into an Institute, where all the facilities available to work up the problem of the child.
As the relief and cure of the problem depends on the accurate diagnosis of the condition.
Hope I have answered your query.