- Patients with any of the following conditions also present on psoriatic areas of the scalp or trunk/limbs: viral (e.g. herpes or varicella) lesions of the skin, fungal or bacterial skin infections, parasitic infections, skin manifestations in relation to tuberculosis or syphilis, rosacea, acne rosacea, acne vulgaris, atrophic skin, striae atrophicae, fragility of skin veins, ichthyosis, ulcers or wounds.