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.

Face acne can be addressed with over-the-counter topical remedies containing benzoyl peroxide or salicylic acid, and prescription medicines such as topical retinoids or oral antibiotics. It is recommended to visit a dermatologist who deals with skin diseases, so as to find out the best treatment for the type of acne you have.
 

The cream you were using might have led to the development of a skin condition known as skin atrophy which causes the skin to become thin and darker. This can occur if certain steroid creams are applied for an extended duration on sensitive areas like the knees. It's vital to discontinue the cream instantly and see a dermatologist for a thorough examination and advice on how to improve the skin condition. 

If a dog of yours scratches or nips at you and you don't see any signs of bleeding, cuts, or wounds, the risk of rabies is among the lowest. Rabies is mostly an infection through saliva, hence, when there is no open wound, the chances are minimal. Watch out for any strange signs such as a fever, headache, or tingling in the area near the scratch. In the event, you spot something peculiar, it's best to get checked out by a doctor anyway. But for now, you should be just fine. Rinse the wound under running water and lather it with soap to disinfect it.

You have a fungal infection in your private area. Sometimes it can be due to sweat, tight clothing, or not drying properly after a shower. The main symptom is the itch and the redness. This can be treated with antifungal cream. Keep the area clean and dry. Loose-fitting cotton underwear and not scratching the area will make it better.