An infra-red lamp should never be used in the treatment of what type of skin?

The use of an infra-red lamp is contraindicated for couperose skin, which is characterized by an increased sensitivity and visible capillaries. This type of skin is often delicate and prone to redness, making it susceptible to further irritation and damage. Infra-red lamps emit heat, which can dilate blood vessels and exacerbate conditions such as redness and inflammation, potentially worsening the appearance of couperose skin.

Couperose skin requires gentle care that avoids excessive heat or stimulation, so employing an infra-red lamp in treatments would not be appropriate and could lead to adverse effects, whereas normal, dry, and oily skin types do not share these specific sensitivities to temperature changes and can usually tolerate such treatments better.