Welcome to health care Magic.Common causes of the genital itch would include a fungal infection
,a trichomonial reaction,allergy
to soap/detergent/deoderants/perfumed toilet paper,eczema,rarely pubic lice,scabies
,psoroasis and psychosomatic itching secondary to stress may occur.in hot weather prickly heat
may be the cause. STDs and chlamydia will need to be ruled out by your doctor/gynaecologist who can examine,investigate and guide you further.