### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Mysterious swelling that flares up a few times a year, with lumps or denser areas which has not been satisfactorily diagnosed. Areas affected would be feet, legs, groin area, hands, arms, back of neck. It looks like an infection since it is red, swollen, sore but no opening in the skin. I think it may be an auto- immune problem. I ve had this now since I was 30 yr. old and am now 58 yr. old. I thought perhaps it could be Sarcoidosis, however chest x-rays do not show abnormal lesions which is usually found with this disease. Sarcoidosis is however difficult to diagnose. Doctors do not seem overly concerned, but if it is Sarcoidosis, that is something that I understand from some sources can be treated with steroidal type medicine. Or it could be something like Sarcoidosis. I would like to get rid of it permanently even though it manifests itself occasionally. First time I got it, it came on suddenly and affected from the knees down. Red slash marks about 1.5 to 2 inches long by about .5 inch wide turned bluish like a bruise and was raised, warm to the touch and painful but denser in the centre. It went away on its own but took a few months. My feet were both very swollen. I get it periodically, seemingly when I m physically and mentally stressed. SDteroidal type cream helps the back of the neck heal.

### output:

Hi. I would like to know that whether in addition to these symptoms of multiple flared up swelling/tender points, are you also having any of the symptoms like fatigue, sleep disturbance, joint stiffness, numbness and tingling? If yes, then you could be suffering from a condition known as Fibromyalgia which is partly Psychiatric & partly Neurological condition. Its exact cause is unknown but any kind of stress, bad eating-sleeping habits etc. are commonly implicated causes. You should visit a Neurologist/Psychiatrist/Rheumatologist for a formal diagnosis of fibromyalgia. Treatment of this condition is usually done with Chat Doctor.  & additionally Psychotherapy/counseling/relaxation exercises/lifestyle modification are also used in combination with medications. Hope this is of help. Good luck