Strange Painful Tingling After Botox on Forehead

Hi Eus,
The crackling or crunching sound during Botox injections is due to the needle penetrating the galea (an anatomic tissue layer of the scalp). The crackling is not related to your symptoms of tingling.
Most likely, a nerve was hit by the needle during the Botox injection. The tingling, strange painful feeling should subside within a week or so. If you are able to take an anti-inflammatory (Advil, Motrin), the medication should help you feel better.
Good luck and be well.
Dr. P

I think the funny sensation on your forehead will subside quickly. If it's not gone in a week, certainly bring this to the attention of your doctor.
Crackling during a forehead injection (sometimes described as crunching) is common, and not likely related to the tingling.
I hope this helps, and best regards.

Tingling could be early sign of Herpes Zoster in the forehead. It is mostly in the middle, right between the eyebrows. If it gests worst or you break out in some vesicles (tiny boils) you must bring it to your doctor's attention and start an antiviral medicine.
Regards