The rash on forehead and spreading to elsewhere would be prurigo simplex
Multiple factors can cause.
Stress, mental upsets,sun rays, dust,soap ,clothes...etc may be responsible.
You cosult dermatologist
for perfect diagnosis.
Antihistaminics like levocetirizine
may be taken.
If it is severe, steroids
in tapering dose may improve.
Apply mild steroids with antibiotics.
Avoid soap bath.
Have patience and be cool...reduce anxiety and stress.
I think, you may be benefitted.
I hope you got my answer.
Dr. Ilyas Patel MD