That's an area where there is a lot of blood flow, unfortunately. The penis has basically sacs that fill up with blood to become erect and sometimes even in non-sexual times erections can naturally happen. That can make it bleed more. If he has an internal injury inside of the penis itself (which sounds likely because a few drops of blood are coming out when he urinates), then the urine itself is irritating the urethra when he goes each time. That "may" not be dangerous, but a trip to a urologist certainly wouldn't hurt. Call around to private ones and see if any are doing any emergency visits. The ER is not the place to be and you don't want to get Coronavirus from somebody who didn't listen and went there in the waiting room with it.