I have best tips n remedies for this

No .darkening may be exposure to sun,cold or use of  any cosmetics not suitable to ur skin.

Find out root cause of your problem by ayurved way diagnosis Correct it by ayurved way medicine diet and lifestyle corrections Finding out root cause and its cure is very important for improvement permanent cure Correct diagnosis by ayurved way is very important main factor in treatment Take any ayurved medicine after proper ayurved way diagnosis only for avoiding bad effects of intake Take online consultation directly for accurate diagnosis and treatment diet chart home remedies

If u use turmeric in larger quantity then it may happen.

For what purpose do u using this combination let me know that first then I'll tell u for ur condition which one is best . Proper evaluation is need contact me for further information

If your skin is too dry or too oily then yes. That combination is only for normal skin with no pimples. Also try doing it at night and not in day If you apply turmeric and coconut oil and go in sunlight then definitely it will darken you skin