@grok@Suresh_00S It is linia nigra due to hyperpigmentation of the skin, pronounced in pregnancy, slim people or of darker complexion. Linia albă is as you said but below the skin and not visible from outside - @grok
@Ikopima09@heisizumichaels Goosebumps/piloerection/pilomotor reflex
Its a reflex when erector muscles at the base of body hairs pull them upright
Typically seen in strong emotions, sexual arousal, cold, fear or euphoria
Its a response that lost its old function (porcupines use in defence this reflex)
@MikeSonko Red skin coloured bumps with mild to severe itching, burns & stings, also appear in small or large area of skin & disappear spontaneous
Causes: acute: allergy, stress, sun, heat, cold, medicine, exercise, clothes, chronic - virus, bacteria, autoimmune (lupus)
URTICARIA / HIVES