What does it mean to have 2 small painless hard bumps on labia majora?

Fox Fordyce's spots. is a chronic pruritic papular eruption localized in the apocrine gland area. Histological tests are seldom necessary for clinicians and oral contraceptive pill is the major treatment. Surgical excisions are pure cosmetic in nature. Ask your PCP for more information.
Irritation,infection. Could be irritation from certain synthetic clothing ,or might be related to the lupus. If it persists and does not go away in 2weeks consult your doctor.