Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns.
As per your complain Pimples on face are not commonly due to STD and is due to a few common causes like hormonal imbalances, oily skin, bacterial infection, inflammation, excessive sun exposure etc..
In case if you are still doubtful oabout having sexually transmitted infection you can consult an Infectious Medicine Specialist and get evaluated and he can evaluate you and advise investigations like blood tests to confirm the cause..
Meanwhile you can start anti acne treatment like washing your face with
Glycolic acid and
Salicylic acid containing facewash..
Apply a combination of gels containing Clindamycin and Niacinamide..
Apply
Benzoyl peroxide gel..
You can apply Adapelene gel at night..
Do cool compresses over the pimples..
Exfoliate your skin twice a week with gentle scrub..
You can also be advise to take
oral antibiotics like Minocycline, Doxycycline etc along with oral retinoids like Isotretinoin under supervision of
Dermatologist..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.