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To avoid atopic dermatitis, keep your skin hydrated and avoid the factors that can provoke flare-ups. Use mild soaps and detergents, wear soft cotton clothing, and do not scratch. If you have symptoms of atopic dermatitis, it's necessary to visit a dermatologist for appropriate diagnosis and management.
 

It looks as though you burgeon an umbilical granuloma which is a small piece of tissue that protrudes from your belly button. The yellow discharge may be an indication of the infection. In some instances, it could come on without any pain or swelling. To do this, you have to keep the area clean and dry. It is also possible that you will need antibiotics when the infection gets worse. 

To avoid blade cut marks, a new wound should be kept clean and properly covered to minimize scars. When healed, apply scar treatment cream or silicon gel sheets regularly to reduce the appearance of scars. Do not expose the scar to sunlight because the UV rays darken it. For more severe or prominent scars it is necessary to refer them to the dermatologist for professional treatments such as laser therapy and microdermabrasion. For the situations with deep scarring, sometimes a cosmetic revisional surgery might be an option but it is always best to seek advice from a dermatologist on individual basis.

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. 

Skin tags near the­ perineum are ge­nerally innocuous. They rese­mble small protrusions of skin. Friction and rubbing of the skin causes the­ir formation. At times, itchiness or blee­ding may occur if irritated. If they cause discomfort, a doctor can re­adily remove them safe­ly. Maintaining cleanliness and dryness of the­ area can prevent furthe­r development.

If you put salt (NaCl) on a cut it may hurt a bit. The reason for this is that salt is able to kill germs. Therefore if you rub salt in a wound it will only be painful temporarily. If it hurts too much or continues hurting for too long, rinse the area with water. An application of a mild ointment has the ability to protect broken skin.