Vaginal Yeast Infection (Candidiasis): This is the most common cause of white vaginal discharge without odor, often accompanied by itching and painful intercourse due to the inflammation and irritation of the vaginal mucosa.

Bacterial Vaginosis (BV): Although BV typically presents with a fishy odor, some cases may not have a noticeable smell. It can cause an increase in vaginal discharge and may lead to painful intercourse if left untreated.
Trichomoniasis: This sexually transmitted infection can cause a white, yellow, or green vaginal discharge without a strong odor. It often results in painful intercourse and may be accompanied by itching or burning.
Atrophic Vaginitis: Common in postmenopausal women, this condition is characterized by thinning and drying of the vaginal walls, leading to discharge and painful intercourse.

Cervical Cancer: Although rare, cervical cancer can cause abnormal vaginal discharge and painful intercourse. Regular screening is crucial for early detection.
Pelvic Inflammatory Disease (PID): This condition, often caused by sexually transmitted infections, can lead to severe consequences if not treated promptly, including infertility and chronic pelvic pain.
Endometriosis: While not directly causing vaginal discharge, endometriosis can lead to painful intercourse and should be considered in the differential diagnosis for dyspareunia.

Desquamative Inflammatory Vaginitis (DIV): A rare condition characterized by a purulent vaginal discharge and significant inflammation, which can cause painful intercourse.
Vaginal Tuberculosis: A rare cause of vaginal discharge and pelvic pain, more commonly seen in areas where tuberculosis is prevalent.
Lichen Sclerosus: A chronic skin condition that can affect the vulva, leading to itching, pain, and sometimes discharge, although it's more commonly associated with postmenopausal women.