Thanks for asking the query,
Your husband is suffering from recurrent aphthous ulcers
, it occcurs due to nutritional deficiencies, immunological abnormalities, stress
related factors and allergic reactions.
I would suggest you to get a checkup done.
Apply cortisone acetate
topically over the affected area.
Take warm saline gargles 3-4 times daily to give a soothing effect.
Take mutivitamin tablets.
Apply dologel oral ointment topically over the affected area.
Maintain a good oral hygiene
Also get a routine blood examination done.
Hope this helps out.