Dark Patches On Neck. Aging and sun exposure are the main causes of dark discoloration on the neck. Yogurt is a good cleanser for skin.
Those on chest area are caused by age spots. The following can lead to the black spot on neck hyperpigmentation resulting in dark skin patches on the neck or around the neck. This is also known as solar lentigines or sun damage.
The reasons for dark patches on the neck for them would be different however.
If you want to know more about what could be causing it read on. It is not an infection and is not contagious. They are usually brown black or gray and can vary in size. And hence it is important to know what the dark.