What is the ruling on the prayer of a woman who has a continuous yellowish discharge, and she takes precautions for every prayer, and sometimes (rarely) finds that nothing has come out of her after the prayer, knowing that it is mostly the case that the yellowish discharge comes out, and it is difficult for her to check herself at every obligatory prayer?

Continuous yellowish discharge (ṣufra) is considered impure, and one must perform ablution (wudu') for each prayer after its time has begun. One may pray the obligatory (fard) prayer and as many supererogatory (nawafil) prayers as desired with a single ablution. The criterion for its continuity is that it does not cease for a period sufficient for purification and prayer, or that the time of its cessation is irregular. If this is the case, then its discharge or non-discharge after ablution does not matter.