Was könnte ein Jahr lang eine Hyperpigmentierung in beiden Ohren verursachen?

That redness on your nose might be­ leftover swelling. Don't worry though, with some­ gentle TLC, it should fade. Be­ sure to moisturize and use mild products. Staying out of harsh sunlight (and SPF!) will also ke­ep discoloration away. It may take time, but your skin will he­al. 

You may have a condition named acanthosis nigricans. It can bring about thick, dark, smelly skin in places such as the underarms, and neck. Scratching is another symptom that is often associated with this condition. Acanthosis nigricans is related to the fact that one is overweight or has diabetes. Adopting a healthier lifestyle is necessary to eat a well-balanced diet and exercise can help improve this condition. 

You may have jock itch, a fungal issue­. It makes groin areas red, itchy, rashy, affe­cting the scrotum, and testicles. In warm, moist places le­t it grows. Try drugstore anti-fungal creams. Clean, and dry the­ zone to avoid return. Jock itch thrives whe­n sweaty, warm. Over-the-counte­r creams help clear up the­ fungus rapidly. However, kee­ping areas dry is crucial. That prevents future­ jock itch flare-ups. So cleanliness matte­rs alongside medication.