A red pimple has grown on the glans. I don't know what it is.

A red pimple on the glans may be caused by clothing friction, eczema, balanitis and other reasons.

1, clothing friction

When the surface of clothing and glans skin friction each other, may cause damage to the stratum corneum on the surface of the skin, thus weakening the skin's protective effect on external stimuli, making the skin more susceptible to stimulation and inflammation, so it will lead to local red pimple.

2, eczema

long-term in humid and stuffy environment, may lead to local eczema, manifested as miliary red papules, mound herpes, etc.

3, balanitis

suffering from balanitis, due to inflammation on the local stimulation, can lead to a series of skin cell reactions, including vasodilation, inflammatory cell infiltration, etc., and these reactions will cause local congestion and tissue edema, thus forming small red pimple.