I hope your query with regards to loose  motions have been answered. With regard to the groin lump I would strongly advise a visit to a general surgeon. It could be a lymph node enlargement or a hernia. Clinical evaluation and examination is necessary. The surgeon may thereafter advise further tests like a sonography

[ ] Loose motion can be due to bowel infection or some times drug induced.The most important aspect is to take plenty of oral liquids / ORS powder 2-3 teaspoon in one glass of Luke warm water for 3-4 times a day.Probiotics help a lot in this respect. There are certain anti secretory medicines and antibiotics used to combact intractable diarrhoea. Chronic diarrhoea happens mainly due irritable bowel syndrome which has a totally different line of management.Be on semisolid / liquid diet. Feel free to ask any further quary related to this