to be worried about my head?

[CaramelisedOnion]

Had hair bleached at hairdressers on Saturday. Just touched it now and realized I have 4 or 5 sizeable crusty scabs on my scalp. Am bit worried as this has not happened before....anyone else had scabs on scalp after bleaching? Please respond....freaking out a bit! :(

Allergic reaction?
It isn't normal, they are either chemical burns or a reaction to the bleach.
I'd seek medical advice from google or go and speak to someone in the chemist in the morning.
Definitely contact the hairdresser too.

does it hurt ? happened to me when i home dyed mine, it didnt hurt and no hair fell out , was ok after a few days .

That sounds severe. In 20 years of dying my hair (including bleaching) I have never, EVER had that.
I think you should see a GP.

I'd go and get advice from the GP, can't do any harm, let us know how you get on