c/o lesions over rt upper arm for 7 days for which ampiclox given elsewhere ...but not cured. Initially started as vesicles but later crusted. Kindly guide in Dx and Rx . Tq

Multiple black colored scabs over right upper and lower limb with cellulitis lower limb

Lady aged 32yrs, having such rashes on her body on breast line and near whole of inguinal and pelvic area since 3 yrs. It's burning but rarely itchy, there is pus formation followed by burning and then on rubbing there is burning. Non diabetic,non hypertensive, none of the other family members have same complaint. Temporary relieved by medicine and it reappears. Changed her place thinking it could be due to some allergen without any relief. Attaching pics, please help in diagnosing and treatment.

33yr old male no prior co morbidies took treatment for covid and discharged he incidentally noticed eschar like lesion central necrosis with erythema.. On examination lesion painful non itchy and non dermatomal distribution.. No history fever,no other symptoms Diagnosis and treatment..?

52 years female black scabs on right side ear cheek pricking sensation and whole body itching present. H/o fever present diagnosis and treatment?