Welcome to HCM,
It seems that your husband is having some intestinal infection, bacterial or amoebic.
Go for stool examination and after report go for specific treatment accordingly.
He may go for wide spectrum medicine like Ofloxacillin, tinidazole
combination for 3-5 days if stool testing is not practicable.
Give him light diet like butter milk,curd, rice etc.
give plenty of water and lime water.
Give him fruits like
apple, Dadam ( Oriya )
Ok and bye.