Get to a doctor immediately, or you may find yourself completely unable to urinate if it swells closed completely. You may need to have a catheter passed into your bladder to empty it, then treatment prescribed once the cause is known, or they may be able to treat the swelling in your urethra without passing a catheter on you. Good Luck! [This writer has had this happen.]
Side effects. Don't worry.
Painful.
Torn legaments
Take it to the vet.
The appearance of painful and swollen lymph nodes is another reason for consulting a doctor.
You definitely could have painful swollen veins in your arm after having your blood drawn many times. This happens frequently.
swollen lymph node due to infection, usually in the head region.
swollen just above elbow and painful. developed overnight
it could be an infection you should see a doctor.
Yes - obviously bacteria and dirt can get up there, that's how urinary tract infections come about, you can force things up the urethra but this is not recommended as it can be painful and cause damage.
could be a parotid tumour
The vulva and vagina can be red, swollen, and painful.