Both cases are normal and/or common. :)
Your sensations are normal, and it's not necessarily a bad thing. You just need to make sure to keep up regular chakra maintenance and balance.
Your friend sounds like she pushed herself and has overractive chakras. In case it wasn't made apparent, just as you can have underractive/closed chakras, you can have overractive chakras which is just as detrimental. She needs to start from the beginning working her way up to balance out each chakra. She needs to be careful this time.