What causes swelling on the gum and under the tongue?was diagonised with herpes type 1.please reply me.

Swelling: there are a number of things that can cause swelling in this area and you need to see a dentist for an exam to find out what is going on in your mouth. This is more likely an infection that needs to be treated and not the herpes.

Not typical: This is not typical for herpes though. I would see your dentist too.

See your dentist: Some conditions like swelling on the gum and under the tongue may require further assessment and your dentist may schedule a follow-up appointment or refer you to a specialist to determine a diagnosis. See your dentist for evaluation.