Mild nail injury on my right hand

Patient: Hi, I have injured my nail recently and now it become black at the edge. I have looked up online it could be something called subungual hematoma, should be less than 25% of the finger. Could you please kindly advise regarding to this condition

Symptoms: Just pain when apply pressure on it; not painful if not touching it; no swollen; white, slight grey pus; no fever