Sun Exposure after Hair Transplant

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Thank you for your great help.

Anyway, now almost three weeks have passed since my treatment.
My scalp in the recipient area is still quite red and also has some pimples.

I find this a little bit strange because after my other HT the redness was completely gone within two weeks.

I can't help to wonder if this has anything to do with the sun exposure that I mentioned ealier. What do u guys think?
During the evening the day when I got the sun expoure, like I said before, the entire scalp had a very slight pink color. But of course, the actual recipient area wasn't just pink at the time, it was red. But then it was only three days after the HT so that area was pretty red even before the sun exposure as a result of the treatment itself.
That makes it hard for me to know if the sun made it even MORE red.

Is there anything I can do about the redness?
Do you think it would be pretty safe to try to cover it up temporarily during the daytime with dermatch now three weeks after surgery?

Any input on this?
The transplanted area is still as red.