A number printed on a retreat chart may count bowel movements. That number tells us something about what happened after a purgative. It does not establish that a chronic illness improved. Classical discussions use virechana for purgation, an intervention quite different from the everyday experience of passing a normal stool.
The distinction between an action and an outcome is useful beyond this one word. If someone claims a benefit, ask what changed in the person's health after the immediate effects had passed. Was the change measured, how long did it last and were unwanted effects recorded as carefully as favourable ones?
Repeated diarrhoea can lead to dehydration and disturbed electrolytes. Do not follow a purging schedule found online or stop regular medicines to fit a retreat plan. If you are already unwell after taking a purgative, tell a clinician what you took and when; a picture of the packaging can help.
Further reading: Panchakarma terminology (Ministry of Ayush annual report) · Detox and cleanse claims (NCCIH)