It commonly gets inflamed due to causes like trauma to Incisive Papillae caused by biting something very hard, burning with hot foods or chemicals, a habit of placing the tongue against the Papillae, tooth or gum related Infection in the respective area..
Nothing to worry as it will get resolved soon..
As of now you can apply Lidocaine jelly over it..
Take anti-inflammatory painkillers like Ibuprofen..
Suck ice pops..
Avoid hot, spicy and hard foods..
In case of it does not get better in 3-4 days then an x ray has to be done under supervision of a Dentist..
Hope this helps..