Possible closed cut on finger. will it need looked at or heal on its own.

Hard to guess: It's hard to guess without seeing the wound. That means a video private consultation may suffice (can select Talk To Doctor on HealthTap). Otherwise, an in-person exam may be needed. A person in his 30's has had enough cuts and scrapes to know what typically heals without stitches. Deeper-than-superficial usually means needing stitches, SteriStrips, skin glue, or staples... but it's hard to guess.