Another of EFT's amazing benefits is its ability to often find lost or hidden memories. This can be used for convenience, such as 'I can't remember where I left my car keys', or for therapeutic treatment. In therapy it is useful for finding why a pattern or emotion has been established. In this case you could use a phrase like:

"Even though I don't know why I have this illness, I deeply and completely accept myself"

"Even though I don't remember who caused me this pain, I deeply and completely accept myself"

Sometimes the memory comes back instantly. Other times it may be delayed or just trigger related memories that once treated, lead to the desired one. Once It has surfaced if it needs treating do so in the same way as usual.