What are those tiny fluid-filled blisters on the arm?

Hello,

Welcome to icliniq.com. I have gone through all the details you have posted. Kindly answer some questions. For how many days have you been having these symptoms? Are the lesions present only in one place or are they present everywhere else? Is there itching at the site of the lesions? Did you have any insect bite? Any history of travel to forest or tribal areas?

Based on your symptoms, the possibilities are:

- If you are on steroids, then pustular psoriasis is a possibility, considering your history of psoriasis. Pustular psoriasis is a more severe form of psoriasis and there is a high chance of infection. We need to treat psoriasis and also use high-power antibiotics.

- Chickenpox.

- Reaction to some insect bite.

I would have been able to further narrow down the differential diagnosis if I had seen the photos. Do not burst those blisters with anything. Apply Betadine ointment (Povidone-iodine) over the burst blisters, and you can start taking tablet Clindatec 300 mg (Clindamycin) twice daily in the morning and at night for seven days as an antibiotic to prevent infection. Kindly update me with the answers and photos.