You took antiallergic drugs possibly steroids and antihistaminics for wool allergy
There is possibility that drugs may be responsible for your dark complexion.
You avoid contact with wool.
You take vitamin C
, nicotinic acid and glutathion containing drugs.
There are no prominent side effects of above drugs.
You just apply kojic acid
and vitamin C containing cream.
You wash the face with kojic acid and glycolic acid
containing face wash.
Avoid sun exposure for long time
You may apply sunscreen.
Take healthy food and proper sleep.
Avoid stress and worries.
I hope you will get fair complexion again.
Dr. Ilyas Patel MD