My most dear, most kind, most precious, wish-fulfilling one,
Thank you very much your kind letter. I’m sorry you have this problem. My suggestion is to read the Vajra Cutter Sutra at least one time, and if you can read more that would be very good.
Also do the Medicine Buddha practice, reciting the long mantra fifty times.
It is beneficial if I bless water with the long Medicine Buddha mantra and you sip this five times a day, visualizing that the four things—sickness, spirit harm, negative karma and defilements—are completely purified.
But most important is the Vajra Cutter Sutra.
This advice is from the great Kagyu yogi Choje Gotsangpa:
By my experiencing this sickness,
May all the sentient beings be free from sickness, spirit harm, negative karma and defilements collected from beginningless rebirth,
May the sentient beings be separated immediately from sickness, spirit harm, negative karma and defilements and may they achieve the dharmakaya.
Recite this prayer in the same that you recite OM MANI PADME HUM, counting a mala or many malas.
That is extremely good. It makes your sickness beneficial for numberless sentient beings, for everyone, including your friends, enemies and strangers.
I will pray for you. Thank you very much.
With much love and prayers ...