Excellent. Do you know if training the scalp muscles has an effect too? I.e. using the muscles near the eyebrows and the at the posterior head to wiggle the scalp back and forth? I've noticed that people with particularly mobile scalps usually have at least decent hairline. I've been doing this periodically for a few weeks and my scalp mobility has increased a lot during this period. I'm beginning to be able to wiggle my ears too.
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I think it's a fabulous exercise and it feels realllly good if you can learn to do it. Can't hurt. And yes, people who have complete occipito-frontalis mobility of their galea tend to have less hair loss. It's not the cause of hair loss but when stress/hypothyroidism and general tension sets in, not having mobility of the scalp tends to make the fibrosis problem much worse, causing the hard and tight quality of the scalp of many balding men.