PIGMENTATION can have many causes. See a dermatologist. Avoid the sun. Use sunscreen. Use skin lightening creams carefully...

It looks like you have bad case of ringworm which did not respond to the OTC medicines. I suggest that as soon as possible you see a dermatologist who specializes in fungal infections. They may give you oral antifungal medicine and topical treatment to improve the result. Seek urgent medical care since untreated ringworm can cause problems.
 

You may have a common condition called a yeast infection. It is a common disease characterized by burning, a whitish or yellowish vaginal discharge, and also, redness around the vagina and itching. Vaginal yeast infections develop when new fungi appear on this secure bacterial turf. One drop of V wash liquid on the sanitary napkin and one drop on the private part will soothe your pain and prevent you from itching. When you temporarily mitigate the disease using V Wash and antibiotics, it does not mean it has been healed for good. Only by using an antifungal cream like Clotrimazole can you get fully cured. 

Need more details like if you have medical history like You may HAVE A THYROID or nutritional deficiency PROBLEM. Or may be a family history. Need more details such as age and lifestyle factors also impact these issues. Please visist an experienced dermatologist 

You need to visit dermatologist immediately if your child is experiencing rashes and itching due to handling pets. Depending on the severity of the reaction, the doctor may prescribe an anti-itch cream or an oral medication. By that time keep the area clean and dry. avoid touching the rabbits until the rash has cleared. Ensure that the rabbits are healthy and free of any parasites or other conditions that could have caused the reaction. Use gloves in the future when handling them.

Usually, cold sores appear as red, swollen bumps on or around your lips. They can hurt a little and may have clear fluid inside them. The virus responsible for cold sores is known as herpes simplex. You could try using over-the-counter creams or ointments to make them heal quicker. Always wash your hands and avoid touching the sore so it doesn't spread. 

Patches can appe­ar discolored when a fungus infects facial skin. Ce­rtain fungi grow on skin causing symptoms like redness, itching, and flakine­ss. Prescribed antifungal creams or ointme­nts help treat these­ infections. Keeping infe­cted areas clean and dry assists e­ffective treatme­nt. Although not severe, fungal infe­ctions can leave marks if untreate­d. Following medication instructions precisely boosts tre­atment success rate. 

Acne can cause by hormonal changes, stress, genetics, or other factors. If you have acne that is filled with pus, it is likely that you have an infection. Consult a dermatologist as soon as possible in order to get the proper treatment. You may need topical medication, an antibiotic or other treatment to get rid of the infection and reduce the breakouts. Keep your skin clean and moisturized, avoid touching your face again and again, and limit your exposure to dust and pollution.

You might have had a cyst on your back. It is a sac filled with fluid or pus formed under the skin. If infected, it can be red, white, or black, and the skin can be painful. By the way, the liquid is freed when pressed and the cyst is emptied. The doctor should examine it to be sure it is cared for and removed.

The numerous factors that lead to skin allergies on the backside and legs include irritants, allergenic agents, infection or autoimmune disorders. It is necessary to consult a dermatologist that will conduct sufficiently comprehensive evaluation and suggest adequate options for treatment. Self-diagnosis and self treatment can make the situation only worse complicating it.