Is a small amount of blood considered menstruation—with the possibility of heavy bleeding thereafter—such that it necessitates abandoning fasting and prayer?

If the duration of the blood exceeds fifteen days, then you are a mustahadah (experiencing prolonged vaginal bleeding outside of menstruation).

- If you have a previous regular period: You refer back to your regular period, perform ghusl (ritual bath) after it, and any blood beyond that is istihada (non-menstrual bleeding).

- If you have no regular period and no distinguishing characteristics: You count six or seven days by estimation, as is common for most women you know, consider this your menstruation, then perform ghusl, and any blood beyond that is istihada.

- If you have distinguishing characteristics: You distinguish menstrual blood by its color, smell, or associated pain, provided its duration does not exceed fifteen days.

- During the days of istihada: You take precautions (to prevent leakage), perform wudu (ablution) for every prayer after its time has begun, and pray with this wudu as many obligatory and supererogatory prayers as you wish.