Hello,
Your symptoms are suggestive of seborrheic keratosis(a non-cancerous benign skin growth that originate in keratinocytes
and like liver spots, are seen more often as people age),
solar lentigo(dark (hyperpigmented) lesion caused by natural or artificial ultraviolet (UV) light) or pityriasis versicolor(fungal infection)
I feel that an examination by a dermatologist will be the best. Without examination,it is very difficult to say anything.