welcome,
it can not be due to one tablet of diuretic,
consult your family doctor for complete examination,
most common causes in our practice are diabetic & nutritional deficiency-e.g;
vitamin B12,
get blood test for sugar,HbA1C , vitamin B12,
urinalysis,
other causes may be ,
fibromyalgia,multiple sclerosis,
tibial nerve dysfunction,tight foot wear vascular cause,
take fresh fruits,juices,good hygienic diet,
avoid smoking,alcohol,cola,coffee,junk foods,
do exercise regularly
your doctor may prescribe injection B12-1000 mcg,
take care.