Understanding the Ruling on Blood from Wounds and Squeezed Pimples in Islamic Law

Problem Description:
It is said that the urge to pop a pimple is similar to the urge to scratch an itch. Usually, after a pimple is popped, blood comes out of it.

Question:
What is the ruling regarding blood from a wound or blood that comes out of a pimple that is intentionally squeezed?

Answer:
If the blood belongs to someone else and it is a small amount, it is excused (ma‘fū). However, if it is a large amount, it is not excused.
As for one’s own blood, it depends:

• If the blood comes out without one’s own action (flows on its own) and does not flow beyond the wounded area, then it is impure (najis) but excused.

• If the blood comes out as a result of one’s own action, or if it flows beyond the wounded area, then it is not excused.

Reference:

(فتح الجواد شرح منطومة ابن العماد, 12-13)

كُلُّ الدِّمَاءِ مِنْ آدَمِيٍّ أَوْ غَيْرِهِ سَوَاءٌ كَانَتْ مِنْ بَثَرَةٍ أَوْغَيْرِهَا إِذَا قَلَّتْ فَلَا حَـرَجَ أَيْ إِثْمَ بَمُصَاحَبَتِهَا حَالَ العِبَادَةِ-إلى أن قال-وَخَرَجَ بِقَوْلِهِ إِذَا قَلَّتْ مَا إِذَا كَثُرَتْ فَلَا يُعْفَى عَنْهَا إِلَّا إِذَا كَانَتْ مِنْ نَفْسِهِ فَفِيْهَا تَفْصِيْلٌ حَاصِلُهُ أَنَّهُ يُعْفَى عَنْهَا إِذَا لَمْ تَكُـْن بِفِعْلِهِ فَلَمْ تُجَاوِزْ مَحَلَّهَا فَإِنْ كَانَتْ بِفِعْلِهِ أَوْ جَاوَزَتْ مَحَلَّهَا فَلَا يُعْفَى عَنْهَا بَلْ عَنِ القَلِيْلِ فَقَطْ إهـ.