On hairline tattooing & hair microblading:

Dr Yadav was quoted in a piece on hair loss remedies. Excerpt and link follow.

For people with moderate balding or thinning, scalp micropigmentation (hairline tattoos) / microblading may be an option.

“Done artistically and scrupulously, hairline microblading can have superior results for patients who have significant hair loss, and can’t or won’t have hair transplants. It is also useful for redesigning the hairline for aesthetic reasons of proportion and symmetry. This is a less invasive and more affordable option for people who don’t want to have surgery, or for people who want to see immediate results, but it doesn’t always leave the most natural or real-looking outcome."

Read the full piece at:

https://www.zwivel.com/blog/capillus-laser-caps/