1. Copper decoration: After copper reaction, the skin will appear green. The jewelry we wear may not be pure copper, but the copper content is enough to react with the skin. Especially when some people have strong body chemistry, they are more likely to produce spots.

2. Sterling silver jewelry: Sterling silver contains 7.5% copper, but most of the spots caused by sterling silver jewelry are black, and they occur after the metal and air react and turn black. Some sterling silver jewelry will be coated to avoid air oxidation, but the coating will gradually fall off as you wear it for a long time.

3. Gold jewelry: Gold itself hardly leaves any stains on your skin, but other metals mixed in gold will. Copper, nickel and silver and gold are mixed to change the tone of gold, and make it harder and lower its cost. However, because K gold is mixed with other metal substances, some people may be allergic to these metal substances. If they are allergic to K gold, it is recommended to buy 24k pure gold.

4. Nickel containing jewelry: If you are allergic to nickel, it will leave you more than stains. Wearing nickel containing jewelry will make your skin itchy, swollen, and even yellow water flow out.

Avoid allergies

Wear high purity metal jewelry, such as 18K gold. Try to choose platinum jewelry, which is very expensive, but it will hardly react with the skin and generally will not be allergic; Apply a layer of transparent nail polish where the jewelry touches the skin; If possible, choose stainless steel jewelry; Titanium jewelry, not easy to react with the skin, not metal allergy; Buy jewelry marked "hypoallergenic" on the label, which is specially made for people with sensitive skin; Keep your skin dry when wearing jewelry; Keep jewelry clean to avoid rust.