Hi.. I have small red pimple or bumps like on my...

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Regarding your question

What is the treatment of small red pimple on vulva area ?

Treatment depends on the type of pill that has emerged so it is advisable to visit a gynecologist to perform the clinical examination and get to the correct diagnosis so that:
This pimple  may be an allergy in the vaginal area resulting from wearing tight underwear or sweating or hair removal and is treated with anti-allergic cream such as 1% hydrocortisone on the affected area as well as aloe vera cream
The pimple may be caused by the implantation of a subcutaneous hair and is treated with antibiotic such as fucidin cream
The pimple may be genital herpes that should be treated by cuterization or using acyclovir oral or a cream
The pimple may be a genital wart that needs to be treated and removed
The pimple may be due to a blockage in the small bartholin glands that secrete the vaginal fluid
The pimple may be a skin follicle that is surgically removed 
the pimple  may be a susprcious mass

What tests should be done to diagnose the cause of the pimple ?

Clinical examination
Take medical history
Pap smears in some cases

What causes the appearance of a pimple in the vulva area?

sensitivity
Dermatitis
Engraving the hair inside the skin
genital warts
Genital herpes
Bartholin cyst 
skin appendages
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