This represents the percentage of each dollar of a company's revenue available after accounting for cost of goods sold. If a company produces phones and earns $32 million in sales but pays $24 million for the items sold, then the company's gross profit margin would be ($32M - $24M) / $32M = 25 percent.
The causes of burning feet are numerous and varied, ranging from simple fatigue to more serious conditions such as a nerve damage or circulatory issues. Therefore, the underlying cause should be diagnosed as soon as possible to avoid long-term damage and morbidity.
Skin conditions like eczema or psoriasis can also result in an itching and burning. Gout can cause a burning sensation on the side of the foot. Often burning feet is a common symptom of what is called neuropathy. You can find a list of reasons that a person can get burning feet, such as alcohol use, diabetes, nerve compression. etc. etc. but all the reasons have this one actual cause, neuropathy.