The dermatologist will first need your family history and trichoscopy examination for the evidence of vellus hairs. Then they might begin their treatment with minoxidil, micro-needling and Growth factor injections. If no improvement is seen however, then they will suggest hair transplant.

Nose pie­rcings sometimes get infe­cted. Redness, swe­lling, pus appear when germs e­nter. Soframycin ointment doesn't tre­at piercing infections. Saline solution (saltwate­r) gently cleans the are­a. Rinse piercing multiple time­s daily. If symptoms persist beyond seve­ral days, consult a doctor. Avoid over-the-counter antibiotic cre­ams; they aren't effe­ctive for piercings. 

There are many reasons why your skin may appear older than you’d like. Some of the most common include excessive sun exposure, smoking, and dehydration. Additionally, stress and genetics can also contribute to this issue. To improve the condition of your skin, it is advisable to apply sunscreen every day, drink plenty of water, eat a balanced diet, and quit smoking. Using mild cleansers along with moisturizers can help maintain a healthy complexion.

It is possible that the black vertical line on the boy's thumb nail is a result of a melanonychia striata, which is a linear nail melanin pigmentation. It is relatively common in children and is generally harmless. However, it is important to have it evaluated by a doctor, especially if it is growing, to rule out any underlying medical conditions.

You may have molluscum contagiosum, a viral skin infection that causes small bumps with a white or shiny center. These bumps can appear on your face, neck, arms, or other body parts. It spreads through direct contact. Treatment may include creams, but sometimes the bumps go away. Keep the area clean and avoid scratching to prevent spreading it to others.

According to your symptoms, it is melasma that you might have. It is common during pregnancy as dark marks are forming on the face, especially on the nose and cheeks. It is recommended to visit a dermatologist who can accurately identify and treat your condition

I recommend that you see a dermatologist for this issue. The scar tissue that resulted from the surgery might have injured the hair follicles, thus depriving them of any regrowth. Unfortunately, there is no scientifically based treatment to re-grow hair in scar tissue except by means of a transplant. Some topical treatments may be prescribed by a dermatologist