Brief Answer:
Likely to be Scabies
Detailed Answer:
Greetings
From your description given, and clinical picture provided by you , the lesion look like Sabies.
Scabies is caused by burrowing and release of toxic or antigenic substances by the female mite
Sarcoptes scabiei var. hominis.
Classical borrows and serpeginous lesion especially involving hands and feet favor diagnosis of Scabies. It typically presents as lesion just below the skin as described by you.
I would assure you that its very unlikely to be immunological or hematological. As previously mentioned by me, its unlikely to be
purpura which is one of the manifestation of blood disorder. Scabies lesion usually involve hands and feets and children many of the times there may be no itching. If you carefully observe the lesion there seems to be no oedema or elevation , which goes against the diagnosis of Immunologial/circulatory.
Rest be assured its nothing serious and its most probably Scabies which can be easily confirmed and managed.
Diagnosis is often madeclinically but is confirmed by microscopic identification of mites, ova, and scybala in epithelial debris. Scrapings are most often positive when obtained from burrows or fresh papules.
I would suggest you to consult your Dermatologist/
Pediatrician for further management.
In case you need any further assistance, will be glad to assist you.
Wishing you and your family happy and healthy life
Take Care
Best Regards
Dr Deepak K K
MBBS,MS,MCH
Consultant Pediatric Surgeon