Hi. I'm online and happy to answer your question today.
Given her ocular history there are a number of things that could be causing her pain/localized redness and feelings that a parasite is after her.
Has she been examined by her corneal specialist during one of these episodes and has her ophthalmologist been able to actually see on of these red areas?
Are you available to chat?
We have been experiencing problems with the chat system for the last few days. Our engineers are working on it. However, I'll switch over to the Q&A system. This system works a lot like 'text messaging' but an email is sent to each of us anytime something is posted to this thread. We can continue to work on your question there..... :)