A part of the body (ma-) is full of rash.
Maimma iyaw inawan kwaya, ta maynannget ako.
My body is full of rash, because I sweat.
Someone or a part of the body (may-) develops a rash (-en).
Mayimma akwaya, ta mokohat.
I develop a rash, because it is hot.
Inimma iyaw tachay kwaya.
My arm develops a rash.