Hi, thanks for using healthcare magic
It appears that you may have an infection of the scalp
. The swelling may be secondary to an inflammatory response or also related to the presence of discharge.
which is a fungal infection
of the scalp, is associated with itching.
The exact cause of the would require examination of your doctor, if he or she thinks it is fungal in nature then you would need to use anti fungal agents for 3 to 4 weeks.
I hope this helps