hiiii dear
physical health is must for mental health
if she has
diarrhea than it is must to treat it
sometimes due to it sleep problems arises
but still sleep problem persist than treatment of it required
now a days there are good drugs available in which dependance is very low
like tab zolpidame
but natural way is the best like
regular exercise that make him fatigue
meditations and yoga
fix sleep schedule and stick on it
no day time sleep
avoid
smoking drinking
avoid tea coffee before going to bed
cool and calm bed room
reading boring books while u in bed
light music can help
if she has any associate psychological complain like depressed mood and
anxiety than treatment of it is also necessary
consult psychiatrist
he will guide you wt to do
get well soon
thank u