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This is caused by the dilation of blood vessels in the face and neck, which allows blood to rush to the head. This, in turn, causes the skin to feel warm and turn red. Generally, people with fair skin and younger people are most susceptible to hot face and ears caused by blushing.
1 Thyroid cancer. Thyroid cancer can also cause an excess of thyroid hormones, leading to sweating and excessive warmth, but hyperthyroidism is a much more likely cause.  Rush of adrenaline. âAn adrenaline surge through the body can cause a feeling of warmth that can feel similar to a hot flash,â Campian says.