My right bicep/upper arm area is red and swollen. It started out as 2 red circular shaped spots that were painful. Next, one of the spots developed several small blisters. Now, my entire upper arm/bicep area is warm, swollen & red. It has a red line extending upwards on my arm & one extending downwards. It is painful and very sensitive to the touch.
Probably you are suffering from cellulitis. Immediately go to the hospital. Otherwise u may suffer from sepsis.