What Could Rashes And Pins And Needles On Hands Suggest?

symptoms:
itching rash on left shin but not spreading now a hard bump on leg
red/brown spots on both ankles
indigestion,
extreme lethargy(don’t want to get up missing work)
burning feeling in palms
pins and needles in hands and legs
restless twitching left leg
daily headaches
sore throat
sporadic light headedness
constant thirst therefore constant urination
30 year old male Caucasian 108 kg
Above symptoms ongoing for 4 months
Have been tested negative for , HIV, TB, Leukemia, diabetes
Doctors are stumped