Hello, I have gone through your query and understood the concern. From the description you have given, it appears as though you are passing concentrated urine and hence the smell and color. To clarify, you can get a simple urinalysis. This presentation cannot be related to the insertion of the Mirena. The intake of several foods and also mineral and vitamin supplements can give specific color and smell to the urine. You have to increase the intake of water per day to at least 2 liters. If you notice improvement, the cause is obvious. If not, you should check with a specialist for further management. Hope this helps.