Psoriasis:
- This is a chronic, relapsing, inflammatory skin disorder with a strong genetic basis.
- It is characterized by thickened epidermis, expanded skin vascularity with severe itching.
- It is an autoimmune condition.
Scabies:
- It is a severe, itchy skin infection caused by the mite "Sarcoptes scabiei hominis".
- The mite makes burrows especially on the lower arm, giving rise to an allergic skin response in the form of itchiness and eruptions.
- It most commonly affects children and is contagious.
Tinea corporis:
- This is a superficial skin infection caused by the dermatophyte fungus.
- It can occur on any part of the body, but is especially seen on the arms and legs.
- The lesions are ring-like, with raised, red edges and pale centre.
Zinc Deficiency:
- Zinc is an important mineral required by the body, albeit in small quantities.
- A deficiency of this micronutrient can adversely affect the skin, among other manifestations.
- Skin becomes dry, scaly, red and inflamed, and elbows, hands, knees and feet are most commonly affected.
