Looking at your image, there is visible swelling and inflammation in the perineal region. What started as a mosquito bite that you scratched has likely developed into an infected folliculitis or a small abscess â bacteria enter through the scratched skin and cause progressive painful swelling. The pain on sitting is consistent with this location. This area is particularly prone to infection due to moisture and friction, and it needs antibiotic treatment promptly to prevent it from worsening into a deeper abscess.
Next Steps
Please consult me directly on Practo for a detailed evaluation â I can prescribe the appropriate antibiotic and advise on wound care. If the swelling becomes very large, fluctuant, or you develop fever, see a surgeon in person immediately.