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What is Causes of vulval pain are due to all except: and explain in detail?
Vulval pain syndrome
Vulvar pain sensation may be burning, stinging or irritation. It may be due to several reasons:

Aphthous ulcer
Vulval dermatoses
Herpes genitalis
Pudendal or genitofemoral nerve neuralgia
Vulvodynia (burning vulva syndrome)
Vulval vestibulitis syndrome
Referred pain from urethral or vagina
Psychological