I refuse to discuss chakras in this sense. Chakras are like spiritual organs. They maintain our spiritual health and senses. Would you want a doctor to operate on you without knowing the biology of a human? Then why touch your chakras when they are not fully understood. Know your chakras, yes! Use them as a focus. But please don't play with their size or energy unless you're a master at it and have actually learned from someone who has demonstrated their knowledge through successfully healing the spirit. Reiki masters, shamans, qi gong healers. These people know the spiritual anatomy and know what to touch and what not to.
Look at it this way. If you had your heart broken by a loved one, and your heart chakra is closed more due to this, you cannot just force it open! Its closed to protect you from damage by extreme emotions. Emotions that could potentially cause soul loss and despair.
(Soul loss is not actually the soul running away, it is part of your energy that deactivates in order to protect you from total shut down aka insanity! It occurs when someone undergoes INTENSE emotional tragedy, violence, or abuse. It can make you feel like you are lost, empty or not whole and until it is repaired through time, therapy -- yes a psychologist or wise friend helping you through your problems can heal the soul! -- or repaired through soul retrieval. Soul loss is identified in psychology as disassociative disorder. After studying both soul loss/retrieval and psychology I was able to make the connection. Its amazing to me how Native Americans and psychologist had the same idea, just with different perspectives and approaches.)
So beware. Our body knows what it is doing, mentally, emotionally, spiritually, and physically. Natural healers know that the way to healing is through working with the body's natural ways, not against it.