If you're talking about ONLY after arousal but not necessarily after intercourse, yes it's normal and a condition that males have complained about since the beginning of time.
A swollen vas deferens could be a sign of an underlying medical condition. Prostatitis, or a bacterial infection could be the problem.
It could be a boil, a cyst, or possibly cancer.
it may still be a little swollen, however you may be allergic to them, if it becomes more painful and does not reduce i suggest you go to your local gp to get it checked out. :)
Painful.
bacteria, specifically streptococcal: causes the tonsils to become irritated and later becomes painful.
a localized physical condition in which part of the body becomes reddened, swollen, hot, and often painful, especially as a reaction to injury or infection.
Torn legaments
If a lymph node becomes very swollen and painful, the family doctor may decide to drain it.
Take it to the vet.
You can tell if an infection is starting to get bad if an area becomes red, or swollen and painful. Get to a doctor right away if you get a fever and you don't have the flu.
The appearance of painful and swollen lymph nodes is another reason for consulting a doctor.
fever, severe headache, nausea, and vomiting. As the tissue covering the brain and spinal cord (the meninges) becomes infected and swollen, the patient will develop a stiff and painful neck.