Lymph node in thigh , drains the leg , see for infective foci in the leg , may be nail infection or so on . Also some scotalbinfection or urinary tract infection can cause swollen lymph nodes .with superadded infection
Next Steps
do urine routine
check for blood
sugar levels
Health Tips
if fever is there start antibiotics , get lymphnode removed if swelling is painfull and if it increases in size