Baldness is a common problem among men, as scalp hair is a form of attractiveness for everyone, and for some, it fades with age. Similar problems also occur in women. Scientifically, baldness is called alopecia and, broadly speaking, there are two types: androgenetic and autoimmune.
The most common type of alopecia is androgenetic alopecia. If you see a trichologist about androgenetic alopecia, they'll tell you it's all due to the hormone dihydrotestosterone, a derivative of testosterone. But is that really true? 
The fact is, this same hormone causes hair growth on the face and body. So, according to doctors' logic, we have a paradox or a contradiction: dihydrotestosterone grows body hair BUT causes hair loss on the scalp ?
This paradox has been studied by various scientists and, unlike doctors, they have come to an interesting hypothesis: What if the underlying causes of androgenic alopecia are a disruption of the blood supply to the scalp?
This disruption occurs due to tissue tension on the crown, which in turn is caused by overactivity of the frontal, temporal, and occipital muscles. 
The scientists figured it out and decided to conduct an experiment: relax these muscles with Botox and see what would happen. Miraculously, within nine months, the bald subjects' hair was restored! It wasn't 100% successful, but if you look at the photos in the studies, the results are impressive.
Here, see for yourself:
https://www.ncbi.nlm.nih.gov/pmc/articles/instance/7424364/bin/BMRI2020-1501893.001.jpg
Details of this hypothesis in English and research on this topic can be found in the video linked below. I'd like to point out once again that examples like these demonstrate how deeply mistaken some pseudo-specialists are when they prescribe potent drugs (in this case, finasteride, an enzyme inhibitor that produces dihydrotestosterone) and harm these patients . Keep this in mind!
