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.

face can be made brighter and better and also improvement in the complexion. You would need topicals , and medications as well . Just medications won’t help . However you can start with antioxidants and Supplements

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

It seems like you’ve got post-inflammatory hyperpigmentation after popping your zits. These can result in dark marks on your face. To fade them away, consider trying out products that contain vitamin C, niacinamide, or kojic acid as ingredients. Sun protection is key since UV rays can worsen the appearance of these spots. Also, remember not to irritate your skin further to avoid more dark spots.

Herpe­s is a common virus. It causes itchy, painful sores. The­se blisters often appe­ar around your mouth or private parts. You can get it through close contact. He­rpes may seem bad, but doctors can give­ you antiviral medicine. Using protection during se­x helps prevent spre­ading it too. Good hygiene habits are also ke­y. 

Fruits, vegetables, and grains are very good for your skin. These products contain vitamins and antioxidants that can benefit your skin. Conversely, belief in a protective factor suggests that hormones like androgens cause acne, and poor lifestyle habits by consuming greasy or sweet fatty foods might make acne worse. Drink more water. It is the best way to keep acne away since it purifies your skin. A balanced diet is the most effective means of controlling acne.

Bruising and discomfort after sclerotherapy are natural which normally resolves within a few days. But since you said your veins look worse and are more visible after the procedure could indicate a complication. It's good that you have already spoken with your doctor, but still experiencing discomfort or have any concerns, follow up with them promptly. 

In some cases the veins may fade on their own over time, but if the issue is related to the sclerotherapy procedure, additional treatment can be needed. Its best to follow up with your doctor to discuss your options and determine the best treatment.

Skin melanin treatment surgery can be harmful in the long run so I suggest not to go for it. You can try other treatments like chemical peels or dermabrasion instead. These treatments can help lighten the skin and are not harmful in the long run. Also using moisturizer and sunscreen can help.

Itchy, rashy skin down there­ is no fun, especially in the he­at. This could be jock itch - a fungal thing. Nature's reme­dies like nee­m, turmeric, and aloe may help. Stay away from tight clothe­s. Keep the are­a dry and airy. Eat healthy foods. 

Back acne occurs when hair follicles become blocked with oil and dead skin cells, leading to bumps on the skin. This condition can be worsened by sweating or wearing tight clothes. The itchiness is often due to irritation caused by the acne. To manage back acne, try using a mild cleanser and avoid wearing tight clothing. Use oil-free lotions and refrain from scratching your skin, this can worsen the condition.