Hi, 
Thanks for posting your query. 
With the available described details, there appears to be possibility of 
dyspepsia with decreased gastrointestinal motility. 
There appears to be high possibility of hypothyroidism; presence of bloating and skin manifestation suggests the diagnosis.
Dyspepsia is a collection of symptoms consisting of acidic 
belching, abdominal heaviness and bloating, gargling sound , excessive 
flatulence. 
Your father should consult with internal medicine specialist/ gastroenterologist and should go for thorough check up.
He should also go for 
complete blood count, blood sugar, thyroid profile, and renal function test. 
Your father should also go for urea breathe test for H. Pylori. 
If Urea breathe test is found to be positive then you have to take complete eradication therapy for H. Pylori bacteria. 
Meanwhile, he should also take 
proton pump inhibitors along with prokinetics.
Take care, 
Dr. Mayank Bhargava