How to remove space while inserting and fetching data in and from postgres table?

How to remove space while inserting and fetching data in and from postgres
table?

Whenever i tried to insert or fetch data from the table in postgreSQL it
adds space prefix and suffix of data value. I tried using trim function in
query and also in variable while storing fetch data but it didn't help.
Any way to to get rid of unwanted spaces?
Thanks in advance