nice to meet you here in HCMagic
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided.
The swelling in labia would be a boil or cyst
,in order to prevent further spread of the infection.
1 Keep the area clean and apply some topical antiseptics. Also wear loose-fitting cotton clothing and use an antibacterial soap or mild soap ,that help to relieve your pain.
2 Avoid any kind of cosmetics. Topical antibiotics such as mupirocin
containing ointment are also useful.
3 In case the symptoms persist then oral antibiotics
may be needed.
for further preceding ,have proper examination and proceed
hope helped your query
regards dr.surendiran hcmagic