So I recently visited a WG (report coming soon) and after coming back felt a bit of burning sensation in my lb. It's probably nothing but I wanted to get checked out for any potential STD's. I'm staying around Sai Wan so any recommendations for a good and discreet clinic will be welcome.

Thanks in Advance.

https://www.std-hiv-clinic.hk/en/

I can recommend men’s health (mhs) in central and NeoHealth. neoHealth is super expensive for a full screening - think about 7k HKD... mhs offers the full set at a discount of 2.2k if i remember correctly

HK’s public sector Social Hygiene Clinics offer free STD tests for eligible HKID holders, just walk-in and get tested on same day.  It has to be a Social Hygiene clinic; and, not a Dermatological Clinic.
Please select your preferred location (call to book) …https://www.dh.gov.hk/english/tele/tele_chc/tele_chc_dc.html

https://www.dh.gov.hk/english/useful/useful_fee/useful_fee.html
Fees and Charges for Public Health Care Services provided by the Department of Health
1. Patients falling into the following categories are eligible for the rates of charges applicable to Eligible Persons:
  (i) holders of Hong Kong Identity Card issued under the Registration of Persons Ordinance (Chapter 177), except those who obtained their Hong Kong Identity Card by virtue of a previous permission to land or remain in Hong Kong granted to them and such permission has expired or ceased to be valid;

https://www.dh.gov.hk/english/useful/useful_fee/useful_fee_os.html
OUTPATIENT SERVICES.

(A) Eligible Persons:
f) Attendance at Social Hygiene and Special Skin Clinics for any investigation or treatment relating to sexually transmitted diseases or leprosy, Maternal and Child Health Centres and Tuberculosis and Chest Clinics: No charge.

(B) Non-eligible Persons: Item f) HKD $1,190.