I have 2 possible ideas as to what you're experiencing -
1. Do you wear SPF when exposed to the sun? Without seeing it, just reading the description kind of sounds like a small lesion called actinic keratosis. Like a cluster of skin cells damaged by sun exposure.
2. Since you have suffered from eczema in the past, you're more likely to be susceptible to other similar skin conditions - could also be a small patch of seborrheic dermatitis which can show up on oily areas of the face.
It doesn't sound like eczema exactly if it's not really itchy and isn't flakey or dry. It's hard to say what it is exactly it could be, might be an irritation from something. Is the patch growing or staying the same? Is the lotion you are using fragrance free?