Hello there ,
Thanks for writing your query,
Bad or mettalic taste in the mouth is caused by number of reasons such as;
Reduced salivary secretion or XEROSTOMIA
may lead to salty taste in mouth.
Poor oral hygiene
, improper brushing techniques which lead to accumulation of food debris and bacterial plaque and calculus deposits deep in the gum pockets and root surfaces of the teeth .
bacterial plaque and calculus on the teeth gives fowl odor nad bad taste.
is another condition which leads to bad taste .
Ulcers when infected with bacterial or viral invasion .
alcohol consumption also promotes plaque deposition and gives fowl odor.
stomach reflux , GERD and other gastric problems may also lead to acidic mouth taste .
you need to consult a physician to get the problem confirmed.
Maintain good oral hygiene by practicing regular mouth rinsing with lukewarm saline water or antiseptic mouthwash like betadine or chlorhexidine
start with vitamin C lozenges or chewing gums will promote salivation and help in resolving the problem.
i hope this helps ,