Hi Lybrate user,
I understand your concern. Where do you have the swollen lymphnodes (head and neck area)? This could be a simple apthous ulcer which are self limiting and takes 5-10 days to cure. However unless a doctor examines it is difficult to completely rule out infectious condition like streptococcal infection or viral infection etc. Kindly follow the below conservative steps and hopefully it should be fine.
1. Rinse your mouth and gargle with warm and salted water atleast 3 times a day.
2. Eat less spicy food and nutritious food.
3. Curenext oral gel (turmeric) or orasore dental gel 5 min prior food (if you have severe pain and unable to eat) twice a day
4. Take any vitamin b complex for 10 days.
Follow-up after 5 days if it doesnot decrease.