I would like to know what is defined as "Patigha" (Skt. "Pratigha"), and how it varies from "Dosa" (Skt. "Dvesha").
Dvesha is a base thought of sin, that means dvesha helps to give birth to sins.. Patigha is an advanced form of Dvesha,It's the same which's called as ''Wyapada'' ..If your mind has dvesha and it keeps growing towards a certain person on 9 reasons there you grows patigha on your mind..that 9 reasons are..
That person did a bad thing to me
that person will do a bad to me
that person is doing a bad to me
that person did a bad to my friend
and so on..wyapada or patigha is a more serious form of dvesha as i said above, so it is called a one of dasa akusala(one of ten sins) also..