4 Year Old Girl Has Problem Of Anal Itching,swelling,redness

My 4 year old girl (living in remote jungle area) has history of belly pains which is usually relieved with the routine de-worming (3 day milky drink treatment)(every six months or so). She began complaining with belly pain again...so we gave her the treatment but no change this time began vomiting, fever and then some diahrea. With no Doctors around we gave her an herbal tincture course of treatment from our chinese medicine doc. friend. worked wonders in 3 days she is better... but only to the next day of extreme anal itching, swelling and redness(nights only) (3 nights in a row now). Is there something I can ask for from our local pharmacy that can help with this???