The causes of long black spots on the face like moles include freckles, flat warts, seborrheic keratosis and so on. 1. freckles: in case of freckles, at this time, due to hereditary and other factors lead to pigmentation on the face, so the phenomenon of long black spots on the face. 2. Flat warts: due to the infection of human papilloma virus, these viruses will stimulate the proliferation of melanocytes, thus appearing like a black mole. 3. Seborrheic keratosis: also known as senile warts and so on, may be related to sun exposure, chronic inflammatory stimulation and so on. It can be manifested as one or more brown or black patches or flat papules on the face,. The face long black spots like moles may also be other reasons, it is recommended that the patient in the regular hospital by a specialist doctor for standardized diagnosis and treatment.