You may be suffering from a skin problem called acne. Acne is a consequence of hair follicles being blocked by too much oil and dead skin cells on your skin. Consequently, the skin can become red and itchy and pimples can occur. Allergies or some particular products may also aggravate acne. The best method to clear up the skin is to use gentle non-comedogenic cleaning products and keep your skin clean to the maximum.

Recurring boils can be cured by maintaining it with proper hygiene. Warm compresses may be used to alleviate the pain and aid in drainage. But if the boils keep coming back, it is recommended that one should visit a dermatologist who can provide antibiotics or other medications to treat them.

It seems you have several health issues. All these might be connected with different things. The reason for the bad smell on the skin may be due to sweat or bacteria. Dry skin or a fungus can cause dandruff. Cavity comes from eating sugary food. Back pain could come from bad posture; stomach trouble could be caused by what you eat or stress. Also having an appendix problem may make it hurt when you use the toilet.

Your symptoms sound like athlete’s foot and toenail fungus. An athlete’s foot can cause your nails to turn yellow, make the skin on your feet peel off, and make your toes hurt. The fungus that leads to athlete’s foot loves warm, damp areas – like sweaty feet. You can use over-the-counter antifungal creams on your skin and nails to treat it. Also, try to keep your feet clean and dry so they are less appealing to the fungus.

You may have a skin infection caused by a fungus. This is something that can occur in the body as a result of fungi growing in humid and warm areas such as your groin. It may appear to you as if you are suffering from ringworms those red itchy spots you have on your skin. You may also experience a variety of sensations like burning or stinging. For this, apply antifungal cream which you can easily find in a pharmacy. First clean and dry the area to avoid further complications and help it heal.

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.