If a plate with oceanic lithosphere meets another plate, the dense oceanic lithosphere dives beneath the other plate and sinks into the mantle: this process is called subduction. The sinking oceanic lithosphere drags the rest of the tectonic plate: this is the main cause of plate motion.
You may notice a decrease in symptoms during the build-up phase, but it may take as long as 12 months on the maintenance dose to notice an improvement. If allergy shots are successful, maintenance treatment is generally continued for three to five years.
You receive allergy shots in your allergist's office. You will stay in the office for 30 minutes after you get the shots, in case you have a severe reaction (anaphylaxis) to the injected allergens. Redness and warmth at the shot site are common. But these go away after a short period of time.