Aura Is Nothing But Energy Field Around The Object-Electromagnetic Field. It Is Made Of Different Wave Length. So, It Resemble Colors, Which Help Us To Interpret Or Differentiate Normal Or Abnormal Energy.

Same Way In Human Beings We Have 7 Chakras In Center Of The Body, Which Also Create Different Wave Length-Color, Due To Constant Oscillation.

When This Oscillation Get Affected Due To Internal Or External Energy It Create Different Wavelength, Imbalance Of Chakras Which Also Disturbs Auric Field.

Ultimately Energy In Cell Of The Organs Or Gland Near The Chakras Gets Affected.

So, Initially Body Is Functionally Disturbed (Energy Level), Which Can Be Seen Only In Aura.