What to do with chakra?

[thespiritual1]

I want to try working on chakra. I am actually a little afraid of doing this because many years ago I carelessly tried to open my crown chakra and ended up with a headache. Now the headache has subsided to a great extent, but it still appears sometimes, making it difficult to study and puts me in a dull mood. Moreover, I often get constipation. I have read that working on chakras can heal the body, so I want to try it. I hope it can heal my two main problems, first constipation and second slight headache.
What should i do with a chakra. Do i just feel it? or do I have to move the energy in certain way? There is also something about balancing chakras. What is that? How do you balance chakras? What do we try to achieve by perceiving the chakras? A simple