Is my infected pierced ear normal?

Using the cream may have caused your skin to become thin and fragile, a condition known as atrophy. The dark layer you see could be a result of this. Try using a gentle moisturizing cream with ingredients like aloe vera or oatmeal to help fade it over time. Avoid strong products and give your skin time to recover. Always do a patch test on new products before applying them to larger areas. 

You have been suffering from allergic rhinitis (hay fever) for the last two years. Symptoms like sneezing, running nose, and congestion can be very annoying. Usually, the things that trigger this allergic reaction are pollen, dust mites, or pet dander. Antihistamines like Montas-L can help you by blocking the allergy response and thus, reducing the symptoms. The regular intake of your medication is necessary for the proper control of your allergy.

You might have a swollen lymph node or an infection under your right arm. It's important to visit a general surgeon or a dermatologist to get it checked properly. Early diagnosis and treatment can help prevent any complications. Please don't delay consulting a specialist for your condition.