I have been suffering from low grade fever (varying from 99 deg F to 99.6 deg F) for the last two months and feel lot of fatigue. I have also gained weight (approx 4 kgs) and there are dark circles under the eyes. I have pain in my finger joints and aches in forearms as well as calves accompanied by stiffness towards the back of the neck and shoulders
Hello, It could be a sign of arthritis. As a first line management you can take analgesics like paracetamol or diclofenac for pain relief.  If symptoms persist, it is better to consult a physician and get evaluated.  Hope I have answered your query. Let me know if I can assist you further.