Without examination it is very difficult to confirm a diagnosis, but it can be solar keratosis(small rough or
scaly areas of skin due to damage from sun exposure), Dermatosis papulosa nigra(firm, smooth, raised, dark
brown to black bumps occur on the face and upper trunk; usually runs in families) , seborrheis keratosis(small
lumps due to a thickening of an area of the top skin layer) , syringoma(bumps caused due to overgrowth of
cells), acanthosis nigricans, seborrheic keratosis, solar lentigo or tinea versicolor. I sincerely advise you
consult a dermatologist and get the diagnosis confirmed. Mode of treatment for all is entirely different. I
sincerely hope that helps. Take care.