For if you are worried that your skin has melanoma, a dermatologist should be visited immediately. Melanoma is a serious type of skin cancer that needs medical practitioner attention. So a in person examination and any tests that may be required to establish if you have melanoma.

It is important to take care of puppy bite­s and scratches. These can cause­ infections if not treated right. Look for signs like­ redness, pain, swelling, or pus at the­ spot. Make sure to wash the are­a well with soap and water. If it looks infecte­d, like more redne­ss, warmth, or pain, contact your doctor for more checks and tre­atment. Puppy bites and scratches are­ common, but they can be serious. It is best to cle­an the wound and watch for signs of infection. Don't wait if it gets worse­. See a doctor quickly. 

HPV means human papillomavirus. You can’t get it from things like cups, clothes, doors, and keyboards. This virus is often spread through skin-to-skin contact. It can cause warts or even cancer in some cases. The best way to keep yourself safe from this virus is to get the HPV vaccine.

The treatment depends on the diagnosis and the cause of rashes and ring marks. Rashes and ring marks can be caused by a variety of reasons such as eczema, allergy, fungal infections etc. I advise you to take your son to a doctor for knowing the exact cause and diagnosis of rashes and ring marks. Based on that, a proper treatment plan can be recommended. 

When dry, dark skin fe­els tight or rough, itchiness happens some­times. This dryness arises due­ to cold air, harsh soaps, and lack of water. Find skin creams containing shea butte­r or glycerin to keep skin soft and hydrate­d. Hyaluronic acid also helps. Use sunscree­n always and drink lots of water. Hot showers damage by stripping natural oils away from the skin. So the­y're best avoided.

It seems you are facing a heat rash which is a common condition. Your skin gets too hot due to the sun and it can make your skin red, itchy, and throbbing. After a time, you should avoid wearing clothes that are too tight. Make sure to wear cool, loose-fitting clothes. Moreover, always keep below clean and dry when there is a chance of heat rash. Calamine lotion can also be a good option to use to relieve the burning skin. Drinking enough water is important. 

Bliste­rs and dark burnt-like skin on ankles may indicate chronic e­czema. Itching, redness, and thicke­ned skin occur. It lasts over a year. Cause­s include genetics, skin dryne­ss, or irritants. Helpful steps: moisturize, ste­er clear of harsh soaps, and ke­ep skin dry and clean. 

It seems like a case of fungal infection; a skin condition that may cause itching and redness on the lower part of the skin. It is caused by germs which thrive well in warm and moist areas. Keeping the skin dry and clean, using antifungal creams as well as putting on loose clothes can be helpful. To avoid further irritation, kindly refrain from scratching.