Hi,
You are having itchy infected papular eruptions on scalp and lower extremities.
It seems that you may be having pruriginous
folliculitis.
I do not think it to be
drug rash.
There may be some cause...like stress,poor immunity,internal disease,weather,
Irritants..etc
Blood tests may be done to rule out DM,HIV,anaemia or other diseases.
Antihistaminics like
levocetirizine may be taken till relief of itch.
Antibiotics may be taken to clear secondary infection.
Improve immunity with immunobusters,vitamins,antioxidants and minerals.
Take healthy food.
Avoid worries and stress.
Avoid soap bath, have dettol liquid bath.
I feel, you might improve, but,
consult dermatologist.
I hope you got my answer.
Thanks.
Dr. Ilyas Patel MD