For almost a month now, my stool had been loose.what could be the cause and what should i do to curb that?

Loose stools: If your stools have lasted almost a month you shouldhave your stool cultured to perhaps see if you canbe treated with antibiotics.

Diarrhea?: You don't say whether the stool frequency has changed or whether you are having any other symptoms. Many things, including changes in diet can produce looser stools, but if it continues, see a doctor. Bring a list of all symptoms and frequency of stools with you and be prepared to provide a specimen for analysis and culture. Good luck.