Just to precede my opinion: I am a nurse. However, take all my opinions with a grain of salt and follow your doctor's advice (since he can see you and I can't). That being said...
I wouldn't scrub my head either. Just the consistent back and forth motioning can pull open a dermabond incision cover if the pull is strong enough. Same goes for diffusing. Just the idea of the heat on the dermabond makes me cringe a little. I can't say I know for certain what it would do, but I can imagine. If you diffuse with cold air I don't think there would be a problem though.
I think whatever styling you wanted to do would be fine as well as long as you aren't using acidic products.
Lastly, I wouldn't push past my pain threshold just to get my hair did.  However, you can always pop a tylenol, let it kick in, then go from there.
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No-'poo since 28 Apr 09!
2b/2c/3a, fine to medium texture, low to medium porosity, normal elasticity, medium density.
Co-Wash/Condition: Giovanni 50/50 Conditioner or Suave Naturals Coconut
Stylers: KCCC, HETT mousse, BRHG
Clarify: ACV and baking soda or Giovanni 50/50 Shampoo
NO: bad 'quats, 'cones, 'xanes, drying alcohols, sulfates, or petrochemicals.
YES!: Proteins, honey
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