I recently found that my skin rash, lines, tight dryness, skin fever, hives etc. was due to using a face lotion with Vitamin C. The allergy Dr had me use over the counter cortisone cream and soak in the bath for 20 minutes a day to rehydrate my skin. It worked and it got back to normal. Now I can only use Cetaphyl phase wash and cream. It will go away soon so don't worry.
Also, it is common to have a skin allergy to vitamin A as well so totally stop using anything with vitamins and herbs in it. I tried that too to fix my rash and allergy induced "old" looking skin and it didn't work. It just made it worse. Cortisone cream, Cetaphil cleanser and lotion, bath soak. That's it. In a week you'll be back to normal.
Please excuse my misspelling of face and Cetaphill. I am a scientist so I am used to words with "ph" for the "f" sound and it's late.
I suffered for months with the same problem you are having, contact dermatitis, and no one could figure it out until I used a Vitamin C serum on my face again months later with the same awful reaction and figured out that was it. I am happy my experience can help someone with the same problem so now it makes it not as bad.
Ok, sorry to keep posting but I just remembered other things that really helped.
Benadryl pill for first night for quick relief for the contact dermatitis along with the 1% hydrocortisone cream.
Only use products with no fragrance on your face or hands.
Since I touch my face when I am working, I have to use no-fragrance hand lotion, Eucerine, or Vaseline fragrance free are best.
My reaction caused dry eyes so I used an allergy eye drop for about 1 day as well.
This will all help.