Razor bumps can occur on or near the genitals after shaving. Psoriasis - Bright red, shiny patches on the penis and/or genitals. It typically is not scaly or flaking when it occurs in the genital region due to the area being well-covered, so it retains more moisture than other parts of the body.
A: The main cause of a purple tinge in fingernails is low oxygen levels in the blood. This can be caused by poor circulation, as well as habits that inhibit oxygen absorption such as smoking. A single fingernail may also become purple if it has been injured, indicating a bruise underneath the nail.
Red discoloration under your fingernails can be caused by a number of conditions, some of which could be serious. Talk with your doctor or dermatologist about what may be causing the redness.Some conditions that can lead to a red or brown discoloration under your nails include the following: 1  A splinter hemorrhage.2  This vertical red or brown line under the nail can be caused by an injury, fungal infection, or nail psoriasis, or can be a sign of a heart condition. This vertical red or brown line under the nail can be caused by an injury, fungal infection, or nail psoriasis, or can be a sign of a heart condition. 2  Heart failure. 3  This can cause redness in the white half moon at the bottom of your nail. 4  Kidney disease.