Although the wound looks like a grazed abrasion, its important to know what caused the accident.
Not all abrasions require antimicrobial agents. Unnecessary antimicrobial abuse only promotes resistance.
Hot fomentation is not advised.
Next Steps
I would advise you to visit the nearest clinic/healthcare center and take a tetanus shot (if you haven't in the past 10 years), and while you're there, consult a doctor as well.