I haven’t had any experience with electric scalp massagers. That one looks good, and in theory I think it should help out. Maybe try it a few more times, but if you are noticing consistent hair loss right after, discontinue. You could also look into a high frequency machine with a comb attachment. New Spa makes one that’s awesome. This will emit oxygen into your scalp and has antibacterial properties as well as helping to speed up any healing and stimulate the circulation. (And there’s attachments that help with pimples- added bonus!)

I totallyyy understand your skepticism when it comes to hair loss products. Most of the systems and lines they’ve put out are mediocre and cause dependency, so once you stop using the product you’re at square one. Davines is an awesome company that focuses on food/plant nutrients as well as essential oils to treat hair and scalp (they even have their own farms in Parma Italy, at the same compound as the labs!). They’re B Corp certified and super transparent. They don’t use any chemical sulfates or parabens. It’s one of the few beauty companies I will stand behind 100% and think they truly care about their consumers. Look into them a bit and see if it makes you any more comfortable trying them out.

Every 3rd day is an awesome routine for shampooing. If you’re noticing that your scalp is hot and itchy I definitely think there’s a fungal thing going on, which will explain the dandruff as well. Try adding some tea tree oil to your shampoo, or using that in the oil mix for scalp massage. The anti bacterial qualities might be what you’re looking for. A fungal issue could definitely be causing blockage to your follicles. Don’t be afraid to shampoo a day early if your scalp is feeling like you need it.

Edit: oh yea, switch back to cold water! I don’t think this is the only reason. BUT cold water is much better for the hair and scalp, so it can’t hurt.