Sexually Transmitted Infections (STIs): Symptoms, Prevention & Treatment
What Are STIs?
Sexually transmitted infections (STIs) are infections spread through sexual contact, including vaginal, anal, and oral sex. Some can also spread through skin contact, needles, blood, and from mother to child during childbirth.
Common Types of STIs
- Chlamydia
- Gonorrhea
- Syphilis
- HIV/AIDS
- Human Papillomavirus (HPV)
- Herpes Simplex Virus (HSV)
- Trichomoniasis
- Hepatitis B
Symptoms of STIs
Symptoms vary depending on the infection. Some STIs show no symptoms at all.
Common signs include:
- Burning during urination
- Unusual vaginal or penile discharge
- Pelvic or lower abdominal pain
- Sores, blisters, or warts in the genital area
- Itching or irritation
- Pain during sex
- Flu-like symptoms in early HIV infection
How STIs Spread
STIs spread primarily through unprotected sexual contact. Others spread through:
- Sharing contaminated needles
- Blood exposure
- Skin-to-skin contact (HPV, herpes)
- Mother-to-child during pregnancy or birth
Prevention Tips
- Use condoms consistently and correctly
- Limit number of sexual partners
- Get vaccinated (HPV, Hepatitis B)
- Get regular STI screenings
- Avoid sharing needles
- Practice mutual monogamy
Treatment Options
Treatment depends on the type of STI:
- Bacterial STIs (chlamydia, gonorrhea, syphilis): Antibiotics
- Viral STIs (HIV, herpes, HPV): Managed with antiviral medications
- Parasitic STIs (trichomoniasis): Anti-parasitic medications
Complications of Untreated STIs
- Infertility in both men and women
- Chronic pelvic pain
- Increased HIV risk
- Pregnancy complications
- Organ damage (late-stage syphilis)
When to See a Doctor
Seek medical attention if you notice any symptoms or after unprotected intercourse with a new partner. Early diagnosis leads to better outcomes and prevents transmission.


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