Is pinkish blood a sign of menstruation or pregnancy?
Pinkish vaginal discharge may indicate either a menstrual sign or an early pregnancy symptom, depending on the specific circumstances. The details are as follows:

If pinkish discharge occurs around the expected menstrual period, gradually increases in amount, and is accompanied by mild abdominal bloating, it is usually a normal menstrual sign and does not require excessive concern. This condition represents the initial shedding of the uterine lining. The discharge will typically turn into dark red menstrual blood, with duration consistent with a regular period. Simply monitor the flow volume and cycle regularity; no special intervention is needed if there are no other physical discomforts.
If pinkish discharge appears outside the menstrual period, especially following recent unprotected sexual intercourse and accompanied by mild lower back soreness or fatigue, it could be an early sign of pregnancy and should be evaluated promptly. Implantation bleeding—minor spotting caused by the fertilized egg attaching to the uterine lining—may present as pinkish discharge. If the discharge persists or is associated with abdominal pain, potential complications should be considered.
Maintain good external genital hygiene by washing with warm water, wearing clean, breathable cotton underwear, and changing it regularly. Avoid strenuous exercise, spicy foods, and maintain a regular sleep schedule. When the cause is uncertain, timely pregnancy testing or medical consultation is recommended to ensure prompt and appropriate management.