Why is my skin red and itchy?

You likely have a fungus on your testicle. The symptoms you have mentioned like the peeling of skin, white substance, and smell, along with itching, appear to be a normal fungal infection. They may be caused by the lack of hygiene or tight clothes. This can be solved by keeping a dry and clean environment, wearing loose clothes, and using a pharmacist-recommended antifungal cream.

Without a proper evaluation and diagnosis, I can't say. But normally, suggested treatments for perical pigmentation include topical medications and laser treatments and I do not recommend flutivate cream for pigmentation. However, based on your individual condition, the doctor will recommend the best treatment for you. 

Psoriasis can be a bit challenging to treat but various treatments like medications, laser treatments, alternative treatments like homeopathy etc., avoiding triggers that worsen your psoriasis symptoms can prove useful. I suggest talking to your doctor for proper examination of your condition which will help in deciding which is the best treatment for your condition. 

You most likely are facing swelling of your hands that is induced by an allergy. Allergies develop when the body reacts to a certain stimulus that it doesn't like, which results in swelling. Redness, itching, or even puffiness are the possible symptoms you may get on your hands. The most common causes of allergies can be some foods, insect bites, or even contact with some things. To help with swelling, consider taking antihistamines and avoiding your allergy triggers.

According to what you mentioned, you may have developed cheek pain without any redness or feeling cold. This can a condition known as trigeminal neuralgia which causes sudden and severe facial pains. Make sure you rest, use warm moist clothes on your face then take over-the-counter painkillers. However, if it does not improve or gets worse then you need to see a doctor for further advice.

Syphilis is an infection passed through sexual contact. It can cause sores, a rash, fever, and damage to the body if not treated properly. Doxycycline and ambroxol capsules won't heal syphilis. Syphilis is treated with certain antibiotics that are prescribed by doctors. It's the right way to get a diagnosis and treatment of complications. Don't let it go on; go to a doctor if you suspect you have syphilis.

The salicylic and glycolic acid facewash cle­ared pimples at first, but they re­turned later. These­ acids sometimes dry out the skin too much. This causes more­ oil production, leading to pimples again. Instead, use­ a gentle, moisturizing face wash. Be­ sure to moisturize properly. This ke­eps skin balanced, hydrated, and pre­vents more pimple proble­ms.