Nasty Rash Seen on President Trump's Neck at White House Press Conference

President Trump looks like he's got a problem brewing above the shoulders ... 'cause his neck is sporting some scabs and what appears to be a nasty rash.

Check out this photo from Monday's press conference at the White House ... when Trump turned his head to the left, photogs got a clean look at a red and scabby patch of skin on the Prez's neck.

Whatever is ailing Trump here is on a patch of skin below his right ear ... ya know, the ear that got shot a couple years ago during an assassination attempt in Butler, PA.

Trump's ear is looking good, but his neck certainly isn't.

POTUS was talking to reporters for the first time since this weekend's attack on Iran ... but his physical appearance should raise some questions and possibly even some concern.