Dried Pimple Blood in Prayer

[AStruggler]

Salaam,

In Ayatollah Sistani’s Islamic Laws book it says: 

856. “...If his body or dress is stained with blood, spread over a space lesser than a dirham (which is almost equal to the upper joint of the thumb)...” 

However, another rule in the book says: 

858. “If blood on the dress or the body of a person who is praying, originates from a small cut or wound which can be healed easily, and which can be washed clean, then his namaz is void.”

Is rule number 856 ALWAYS unconditional? Because rule 858 looks like it could contradict 856...

I have a tiny pimple at the back of my head and when scratching my head I noticed a tiny amount (less than dirham) of dried blood in my finger nail, and there was some pus too after I used tissue to wipe pimple.

Can I pray in this sstate because of rule 856? The blood was an extremely tiny amount...

However after reading rule 858, now I’m confused on whether I need to wash the back of my head or not...I do not know when and how long it will heal, or if it’s already healed. I can’t see it. Usually any sort of blood that’s less than a Dirham in size would be washed easily and its source would probably heal quick. 

So what do I do know?

If someone can clear these rules it would be great...

[AStruggler]

Usually any sort of blood that’s less than a Dirham in size would be washed easily and its source would probably heal quick, so then what would even be the point of rule 856, as in most cases the situation would probably fall under rule 858, unless rule 856 is unconditional...but then rule 858 exists so then I guess it’s not unconditional???!

[Ashvazdanghe]

1 hour ago, AStruggler said:

Can I pray in this sstate because of rule 856? The blood was an extremely tiny amount...

However after reading rule 858, now I’m confused on whether I need to wash the back of my head or not...I do not know when and how long it will heal, or if it’s already healed. I can’t see it. Usually any sort of blood that’s less than a Dirham in size would be washed easily and its source would probably heal quick. 

as I know you don't need to wash back of your head ,ask another person or a physician to look at it.