I do not know what might be the cause, or even if this solution will work for you, but you can try it nonetheless because it is easy and safe to start doing and continue on a regular basis.
Based on what little information you have provided, I'm making a guess that you have some (a lot?) of etheric "crud" attached to you, and I won't make a fool of myself by calling it any specific thing. I'm copying the following exercise from documentation for the Fellowship of the Hermetic Rose, compiled by John Michael Greer, a practicing Druid.
The Judson Exercise:
...
The exercise, as Judson notes in her book The Bridge Between Two Worlds, is primarily meant to bring the practitioner into contact with benevolent spiritual currents and chase off negative energies. She recommends it to mediums because it keeps noxious entities at bay. I've (JMG) done some experimenting with the exercise and modified it slightly; you can find Judson's original version via these two links:
1. Stand facing north. Turn counterclockwise (N to W to S to E...) three and a half times, arms extended out to the sides, palms down, concentrating on the idea that unwanted energies are being thrown off as you turn. End facing south.
2. Bring your heels together, shift your weight onto the balls of your feet, extend your arms to the south, spread your fingers slightly, bow your head and close your eyes. Imagine that you are being permeated with the magnetic energies of the earth.
3. Turn clockwise (S to W to N) to face the north. Then raise your arms up and out above your head and look up. Turn very slowly clockwise once around, while imagining life and blessing descending to you from the sun. You can say a prayer or spoken invocation as you do this.
4. Extend your arms to your sides, palms down, and turn clockwise four and a half times, concentrating on the idea that you are wrapping yourself and your aura in the positive energies you have invoked. End facing south.
5. Sweep your "positive hand"—this is usually the hand you write with—palm down a few inches above the palm and forearm of your negative hand, which is held palm up. Do this three times, sweeping the hand from elbow to fingertips. Then reverse, and sweep off the positive arm and hand with the negative hand.
These stages are, respectively: (1) throwing off inharmonious [etheric] magnetism; (2) blending with the [etheric] magnetism of the earth; (3) calling down beneficent influences from above; (4) gathering them up and charging the aura; (5) sealing the aura.
