Thanks for asking the query,
I would suggest you to visit to the Physician and get a checkup done.
Foul taste in the mouth can be due to xerostomia
, it can cause other symptoms like dental caries
, gingival and peridontal problems.
I would suggest you to get a dental checkup done.
Take lukewarm saline and antiseptic mouthwash rinses.
Maintain a good oral hygiene
Sip plenty of water.
Hope this helps out,