Some conditions may also cause you to have blood or protein in your urine. If you have a urinary problem, see your healthcare provider. Urinalysis and other urine tests can help to diagnose the problem. Treatment depends on the cause.
Cold sores are usually caused by the herpes simplex virus (HSV) type 1, which is transmitted by such forms of contact as kissing an infected person or sharing eating utensils, towels, or razors. Genital herpes is usually caused by herpes simplex virus type 2.
The virus that causes cold sores is herpes simplex 1, or HSV-1, a cousin to the herpes simplex virus 2 that causes most genital herpes. More than half of all Americans are infected by type 1 herpes by the time they're in their twenties, so common might be another apt description for cold sores.