I googled tip of finger peeling and found your post. Yes, I have the same problem.

I also, have psoriasis. (on body and under my fingernails) I am 50 and have had psoriasis since I was about 25.~ The tip of the finger peeling is something quite new.

I sometimes get a tingling feelin to my left hand when I stretch it out wide, it comes and goes, has anyone else had this symtom before?

I have had psoriasis for 30 years. I began to notice 3 years ago that, after playing guitar for several hours, my eyes would red up and itch. It got worse as the months went by and they soon began to swell and itch like poison ivy burns. It was lasting longer and longer up to two weeks to return to normal. I had a patch test and discovered I have become extremely allergic to nickel after years of regular contact. My doctor told me a slight nickel allergy can advance to extreme with more and more nickel contact. I changed all frets, strings and other hardware to from nickel to stainless steel on all my guitars. I can now play a full show with no ill effects from nickel. As a side benefit after about six months after the the changes to my guitars my psoriasis is now clear.
I found out there is allot of nickel in this world. My office chair, belt buckle, snaps on jeans, some door handles, tools, fixtures, glasses, dirt, golf club shafts, key rings, jewelry, lots of musical instruments, and many many other things. This substance should be outlawed. If you have psoriasis it may be a nickel/bronze allergy.

From what I've heard Psoriasis isn't an allergic reaction, its a genetic problem with the skin cells renewing themselves too quickly. Nickel reactions are most likely dermatitis in the form of eczema.

I don't know what it is.
This is what I know, I was a typical psoriasis person with red patches of skin that were covered with thick white scales. I have always had it on my knees and elbows. I have had it at times on my torso so bad that I would crack and bleed if I twisted too much. I been to countless doctors who said yup you got psoriasis. I was in the military and had a team of doctors review and study me. My psoriasis sometimes got better and sometimes got worse and I never had a clue as to why. I've tried diets and gave up. I eat peanuts, chocolate, and anything else I want and I drink whiskey when I want. I smoked for 30 years. I quit smoking for two years and then started back. I don't do any illegal drugs. I have played guitar for 30 years. When I changed my guitar strings and hardware from nickel to stainless steel my psoriasis cleared completely for the 1st time ever and I am still clear. If I come in contact with nickel, my eyes will start burning, swelling, and itching. The best way I can describe it is "Its like ants crawling around on my eyelids and taking a byte now and then. When the swelling goes down (about a week) the area around my eye turns brown and crusty and takes a week to heal to normal. Needless to say, I avoid nickel!

Age Event
@10.Play guitar sometimes
@15.Began cleaning golf clubs for my dad and his friends.
@18.Diagnosed with psoriasis
@19.Started playing guitar and golfing weekly
@45.Noticed fingers itch after a gig
@46.Noticed fingers itch and peal after a gig right wrist itch also
@48.Eyelids slight burn and itch during a gig
@50.Eyes swell and itch uncontrollably (discovered nickel allergy)
Changed guitar strings and hardware and can now play.
Avoid nickel (not a easy task) it's everywhere.
@51.psoriasis gone for the 1st time since age 18!
@53.Telling Somebody!

I know several guitar players with psoriasis and have informed them of my experience.

I play guitar for live events and half the stuff on stage is nickel and I must avoid.

Some buildings have nickel in the air (from HVAC systems I guess) and within ten minutes my eyelids will begin to burn. I have to leave the building and wash my hands and face.

Guitar Center is one of these buildings. When I go there I must make a plan to get in and out fast.

I use D'Addario XLS and XL Prosteels and Ernie Ball Stainless Steel strings for electric. They take some getting use to as far as eq-ing for tone. They sound best on my fender twin, HRD, and Mesa mark III simul class and not so good on my SS amps. I use to use GHS Boomers nickel coated and those strings are pure poison to me now. I use martin silk and steel for my acoustics. They always sound old and like they need to be changed. I had to paint the latches on my guitar cases. I had to change from switchcraft to neutrik ends. Had to change frets to stainless steel. I had to change tuning keys on one of my guitars. I put a piece of electrical tape on my bridge where my right wrist rest while playing. I had to switch to graphite shafts on all my golf clubs. I no longer shake hands with other guitar/bass players. I now, never let anyone play my guitars or carry my equipment. I never touch the guitars,amps,cables,tuners,ect.. of others. The guys in my band have seen me with my red swollen shut watering eyes and understand.