Hi,
Noted your history of acute pain in right leg, normal
ultrasound,
dehydration, low electrolytes and high blood sugar.
As per the history you have provided, there looks to be an acute cause like some infection or trauma.
Hence you need the following:
Detailed history.
X-ray of leg/foot whichever has the pain.
Diabetes does not cause acute pain unless there is an active infection.
Get the dehydration and electrolytes corrected well as these may cause
deep vein thrombosis.
Further evaluation again by color doppler of lower limb and control of blood sugar, antibiotics and anti-inflammatory medications with painkiller properties may help you further.
If the cause is Neurogenic then
gabapentin or such medications may be needed.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. T. Chandrakant, General Surgeon