cyber- If the dog is also tilting his head, its in the canal- if the ear is just more sideways- its on the tip of the ear.
See if the ear is clean. You are looking for black dirt particles ( ear infection of maybe even mites). If the ear is clean, you can get a little hydrogen peroxide and put some on a paper towel, and wipe only to where you can see, clean the ear. This will also soothe if its a bug bite.
I suspect its on the outside of the ear. The reason I say this is that if it was inside, you would also see the dog trying to rub his ear with his paw. ..
HOw are things this morning?