Swollen labia can be caused by physiological factors, personal factors and disease. If it is accompanied by local itching, pain and increased discharge, it may indicate the presence of gynaecological diseases, commonly gynaecological inflammatory diseases such as bacterial vaginitis, vestibular adenitis, trichomoniasis, etc. It is advisable to consult a doctor as soon as possible to identify the cause and treat it promptly. Do not self-medicate without knowing the exact cause.