Hello and welcome to Healthcare Magic. Thanks for your query.
The dark discolouration in the ear following wearing metallic ear rings could be due to a "contact dermatitis". Contact dermatitis is a kind of allergic condition where there is skin irritation and an allergic reaction
to external contact irritants like metals, powders, chemicals, etc. Many people commonly develop this in response to metallic objects like watches, bracelets, ear rings, etc.
The most effective way of dealing with this problem is to identify the allergy
causing material and avoiding it. If there is itching, skin rashes and eruptions, then using an anti-allergy medication will help. Otherwise, once the irritant material is removed, the reaction will subside on its own. Very gradually, the discolouration should also disappear. If the discolouration is very cosmetically unacceptable and you would want a quicker remedy, then there are laser
treatments which can remove such discolouration or pigmentation.
Wish you all the best.
Dr. Sheeba Stephen