What is up with my toe nail? 1yr ago the dr. Removed a toenail after it had lifted from the tip back reason unknown. No fungus. It is lifting again.

See a dermatologist. There are various possible diagnoses, including fungus, injury, thyroid disease, raynaud's, etc. Sometimes it is best to do a permanent destruction of such a nail.
Nail Lifting. You have a condition called onycholysis. Go to the following web site for information about this nail disorder.http://dermnetnz.mobify.me/hair-nails-sweat/onycholysis.html.