My 7 year old daughter who has habitual constipation since the age of 3, has been recently getting regular with her bowel movements. 3 days back she had loose motion, I gave her Econorm (282.5mg Lyophilized Saccharomyces, equivalent to 250mg yeast) once for two days and Sporlac half tablet twice daily. She passed watery stools once today and now, before sleeping she passed black oily stools. I found this alarming. What exactly is happening, can someone help please! Her body weight is 17 kg