Hi, you are having generalised 
pruritus with papular eruptions. So it seems  that you are having either prurigo, lichen urticatus or 
dermatitis.. Allergic or irritant. In any case, you should be investigated to rule out internal diseases.. DM, 
Anaemia, or internal diseases. You should remain away from irritants and allergens for few months.. As chemicals in gym, dust, fume, pollens, soap, beauty cream and powders, deodorants, perfume...etc.  avoid pruritogenic diet.. Fish, prawns, colored cold drinks, brinjals,curd, cows milk and its products, fermented food... etc. Take antihistaminics till itch is relieved, 
steroid in tappering dose for 4 weeks. Apply moderate potency steroid cream twice a day. Dettol liquid  bath. .. I hope you will be recovered. Still, you consult nearby 
dermatologist... Ok