Help! Could it be mold?

Alright so I have had my dreads for almost 3 months, and today i bleached them (actually I am waiting to wash it out right now).
After i put the bleach in i noticed around the roots of my dreads, where it is the tightest, that there is a sort black discouloration, and this is around many of the dreads.
Could it be mold? And if so how do i get rid of it?

PLEASE HELP

Any tips or adive is greatly appreciated

updated by @ramble-on: 01/13/15 09:10:28PM

not likely if it was youd smell it and bleach would kill it could be soap scum grime if u dont wash well could be blood if u scratch anlot

if u live in a dirty city it can be literaly tire rubber from all the trafic it fills the air and gets on everythuing

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My new book Ban The Taboo Vol 1