Faecal incontinence can also occur after spinal injury, stroke, in Multiple Sclerosis and in long standing diabetes. In the elderly, faecal incontinence commonly accompanies faecal impaction. Rectal distension stimulates the secretion of mucus, which can seep through an insensitive and weak anal canal.
https://www.theibsnetwork.org/diarrhoea/urgency-and-faecal-incontinence/