 [ Symptoms ] can antibiotic cephalexin cause blue veins to appear in forhead i just started taking cephalexin 500mg after minor operation blue veins appeared in my forehead could this be reaction to drug if not is is serious  jmcnich196@aol com [ Disease ] i have used this antibiotic for 40 years and i have never had a person return with blue veins on the forehead this would not be a cephalexin drug reaction or side effect