<s>[INST] Causes of pain in upper right arm of 66yr old diabetic female?  feels like burning nerves in fleshy outer area above elbow.  almost like a sunburn or steam burn.  Have eye condition preventing me from seeing if pink or reddened.  Cannot feel a rash.  Even clothing irritates it and increases pain.  Has not subsided in five days. [/INST] Hello, Thanks for the query. If you have been having diabetes since long, then there is a possibility of developing diabetes related peripheral neuropathy. Sometimes it can affect a single nerve (acute mononeuropathy), as your present complaint is there. Most important is to achieve a strict blood glucose control with fasting <100 mg, PP 160 to 180 mg & HbA1c%<7. This will help in reducing the intensity of neuropathy.  Chat Doctor.  Plus Methylcobalamine tablets 500 mcg per day can also be taken. Thanks </s>