Hi,
Welcome to ehealthforum,
It is difficult to comment on the cause for the symptoms and the 'painful vulval bump' that you describe without examining you. The chances of infection cannot be ruled out. Only after careful examination and further evaluation the causative agent/the actual infective cause can be identified. Do not ignore your symptoms. Visit your doctor/gynecologist at the earliest for thorough examination (to look for the characteristic features of the bumps and local issue reaction), and evaluation (swab/smear test, blood work-up, STD screening tests etc). Treatment as appropriate (based on examination results and investigation results) would be started to help you control the symptoms. Be in regular follow-up & monitoring of your treating doctor/gynecologist. Take adequate rest. Drink plenty of water. Maintain healthy diet. Use loose cotton undergarments and avoid use of tight fitting clothes. Avoid sweat accumulation in the area. Keep the area clean and dry. Avoid vaginal douching, or use of harsh soap or perfumes in the area. Use loose cotton undergarments and avoid use of tight fitting clothes. Avoid activities that involve exchange or sharing of body fluids. If infective cause is detected, and if you are sexually active, get your partner also treated simultaneously to prevent chances of re-infection, and avoid having intercourse while being on treatment.
Take care.