Answer:
What can you hold in your left hand but can never hold in your right hand?
Not my sister nor my brother but still the child of my mother and father. Who am I?
If you suffer from this, you might wear a wig
Long and thin, red within, with a nail at the end.
Most people need it, some ask for it, some give it, but almost nobody takes it. What is it?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.