Halal General principles
Yes. Contemporary scholars agree that a blood transfusion is permitted as a medical treatment, to save a life, and that it is not the same as consuming blood. The Quran praises saving a life (5:32).
مِنْ أَجْلِ ذَٰلِكَ كَتَبْنَا عَلَىٰ بَنِىٓ إِسْرَٰٓءِيلَ أَنَّهُۥ مَن قَتَلَ نَفْسًۢا بِغَيْرِ نَفْسٍ أَوْ فَسَادٍۢ فِى ٱلْأَرْضِ فَكَأَنَّمَا قَتَلَ ٱلنَّاسَ جَمِيعًۭا وَمَنْ أَحْيَاهَا فَكَأَنَّمَآ أَحْيَا ٱلنَّاسَ جَمِيعًۭا ۚ وَلَقَدْ جَآءَتْهُمْ رُسُلُنَا بِٱلْبَيِّنَٰتِ ثُمَّ إِنَّ كَثِيرًۭا مِّنْهُم بَعْدَ ذَٰلِكَ فِى ٱلْأَرْضِ لَمُسْرِفُونَ ﴿٣٢﴾
因此，我对以色列的后裔以此为定制：除因复仇或平乱外，凡枉杀一人的，如杀众人；凡救活一人的，如救活众人。我的众使者。确已昭示他们许多迹象。此后，他们中许多人，在地方上确是过分的。
This is general information, not a fatwa. For your own situation, ask a qualified scholar.
Yes. Contemporary scholars agree that a blood transfusion is permitted as a medical treatment, to save a life, and that it is not the same as consuming blood. The Quran praises saving a life (5:32).
