Blackheads are small bumps that form when hair follicles get blocked by dead skin cells and excess oil. This can happen due to excess sebum, hormonal changes, or improper skin care. To reduce blackheads, use a gentle exfoliating scrub and a non-comedogenic moisturizer. Always clean your skin well to avoid irritation and prevent the urge to squeeze blackheads.

It is best to consult with a dermatologist to get an accurate diagnosis and treatment plan for your melasma. Depending on the severity of your melasma, they may recommend a combination of topical and laser treatments, chemical peels, lightning creams. Recommended limiting sun exposure and wearing sunscreen with a high SPF rating, to reduce your risk of further melasma flare-ups.

Your daughter most probably has a skin infection called Impetigo. A painful, red spot with white spots around it is a symptom of this illness. This is due to bacteria entering the skin, which usually happens when a cut or insect bite is present. To deal with this issue, keep the area clean, apply antibiotic cream, and cover it with a bandage. Make sure she doesn't scratch it to prevent spreading the infection.

Herpes simplex is a virus that causes cold sores on your lips. These cold sores can feel painful, itchy, or tingly. Don’t touch or pick at them. You can use a cold compress and over-the-counter creams to help soothe them. Eating healthy and getting plenty of rest will help your body fight the virus better.

I understand you're dealing with skin itching. Itching can occur when your skin becomes dry and rough, often due to not drinking enough water, using harsh soaps, or cold weather. To manage it, make sure to drink plenty of water, apply moisturizer gently, and avoid harsh soaps. Also, protect your skin from the cold by wearing gloves and scarves.

White patches on your shaft are around sometimes because of a fungal infection called candidiasis or a disorder like lichen planus. These can show up after sex, especially if unprotected. These can be cured by taking medications ordered by a doctor after proper diagnosis. 

A canker sore­ might trouble your mouth. They are small, round, and painful sore­s. Stress, spicy foods, or biting your cheek can cause­ them. Try over-the-counte­r rinses or gels to ease­ pain and speed healing. Soft foods are­ better; avoid spicy or acidic ones. Give­ it time - around one or two wee­ks - and it should disappear on its own.