 [ Symptoms ] i have started suffering burning muscle pain and achy joint pain i have been fatigued experienced brain fog [ Disease ] hi this seems to be seronegative arthropathy with deficiency of carnitine causing burning muscle pains a whole body dexa scan will be helpful to see the status of bones few tests related to joint arthritis need to be done to come to a diagnosis including ra test uric acid hlab27 consult a rheumatologist