Yeah, that condition is actually an alteration of DNA except it’s not one you want to have but rather that pluages you.
Working with healing Energies will show some results.
Ra-Pha-El.
Mar-Bas.
Very interesting to me is the fact that it actually causes your breath to be absorbed differently in your body then in those other people around you.
That alone point’s shitloadly big towards Qi._Gong or Yoga and working actively and controlled with your breath.
I’d suggest you do visualization meditations:
Breathe in and out just relaxed.
No controlled amount or counting.
Just relaxed, and easy.
Feel if there’s a specific Collor that comes up for you (-check for chakra disalignement.)
If yes, check which chakra and focus on it’s Energy.
Otherwise, go with general Healing Energy - Green - Heart Chakra.
Focus on your breath filling your body with new and healthy Energy, and pushing out the sickness through your skin, away from you.
breath by breath the green light in you grows stronger and the unhealthy mist fades away more and more.
These Meditations can be repeated, increased in power by combination with blood magick, by invocation of Angelics and/ or demons.
One very lovely short ritual i suggest you to do, just becouse it’s crazy potent:
get a fresh raw egg, crack it open into a bowl.
Lay that bowl below your bed before sleeping.
Ask Marbas to remove the Sickness into the offering of Innocent Life.
Sleep,
Throw the Egg away in the morning.
-hey, if it works against poison and bleeding, it’s worth a try, isn’t it? 
You may want to look into
Sincerely,
¥’Berioth