Do you have any other symptoms such as dry mouth and eye , fatigue ?
Any relevant medical history ?
What are the findings if you had any Blood test or a Urine test or an X-Ray or any other tests ?
Do you have any medical illness ?
Do you take any medication ?
Patients with Sjogren's Syndrome complain of having a "soapy" taste in their mouth.
Sjogren's Syndrome can produce a foul soapy taste in the mouth. Sjogren's syndrome is a chronic disorder that causes insufficient moisture production in certain glands of the body. It occurs when a person's normally protective immune system attacks and destroys moisture-producing glands including salivary glands and tear glands. 10% of people with Sjogren's Syndrome are men.
Avoid activities that increase dryness symptoms e.g. avoid smoking and avoid low-humidity environments.
Maintain adequate hydration by drinking at least 2 quarts of fluids daily.
Salagen (pilocarpine) 5 mg daily is sometimes used to increase salivary and lacrimal flow rates. Improvement takes at least 6 weeks of treatment
Cholinergic medications e.g. Evoxac (cevimeline) 30 mg 3 times a day can help to increase the activity of salivary glands.
I recommend that you be examined and treated by a rheumatologist. A diagnosis of Sjogren's Syndrome is made by the presence of auto-antibodies in the blood (anti-SSA or anti-SSB also called anti-Ro or anti-La) and/or a biopsy of the inner lip which may show inflammation which has damaged salivary glands. The Schirmer test can also be used to diagnose Sjogren's Syndrome (filter paper is placed near the lower conjunctival sac to measure tear formation).