Brief Answer:
I would like to rule out allergic reaction first

Detailed Answer:
Hello

Thanks for the query


After going through the image you have attached and the history in detail I would like to rule out allergic reaction or erythema multiformae first.
The itchy rashes of different size and shapes with red margins and central pallor is characteristic of allergic skin reaction(urticaria) or a similar condition called erythema multiformae(It can be due to allergy to drugs or some infection).
Even low grade fever and abdominal pain with swelling of lips and extremities suggests that it is allergic in nature(less common in erythema multiformae).

Biobita is a preparation of probiotic with multivitamine.There is no known allergy to this preparation.Sometimes it is difficult to find the causative allergen due to their ubiquitous nature.The allergy can be precipitated by dust,mites,pollens,pets,some eatables,perfumes and many other things.

The viral/bacterial infection can also present with rash and fever but in that case the character of rash is usually maculopapular or vesicular(the rash showing in image is highly unlikely in viral/bacterial infection).

One condition called kawasaki disease an immunological disorder can present with the fever,rash,swelling in extremities but again the character of rash will be different and to complete the diagnosis of kawasaki there must be some other features like conjuctivitis and lymph node enlargement(so I don't think this as kawasaki disease).

The stevens johnsons syndrome is a skin disease(severe form of erythema multiformae) mostly due to drug reaction and sometimes in viral infection.In this condition there are ulcers in the lips,oral cavity and genitalia?(at least two mucosal surface involvement is must for making the diagnosis).

The severe allergic reaction(anaphylaxis) may cause some renal abnormality.Some rare viral infection can also cause this type of rash.
The management remains same as most of the viral infection does not need any specific treatment.

In this situation I would like to wait for the report and till then give plenty of fluids with symptomatic treatment like antiinflammatory and antiallergic agents.

Regards

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Brief Answer:
We can get an idea by raised eosinophil or serum IgE level

Detailed Answer:
Thanks for the follow up

Mostly this type of allergy is immunoglobulin E mediated and in blood test it is suggested by raised eosinophil and increased IgE level.

I would like to get CRP and procalcitonin done to see whether there is associated bacterial infection.
In Kawasaki disease there will be enlarged lymph nodes but this should be unilateral and in the neck.The urine may so pus cells but the culture will be negative.But again the character of rash is not suggestive.
In case of allergy the flagyl should be stopped if it has been started before appearance of rash as it may be due to allergy to flagyl only.

Will be glad to follow you up.
Regards

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Brief Answer:
May be erythema migrans if not allergic

Detailed Answer:
I hope by this time all required investigations would have been done.In comparison to previous picture the severity of rash appears to be decreased.
Rashes Of Erythema migrans in Lymes disease(a bacterial infection) can also present with the same character.
Please send me other reports with case history so that I would be better help you out.
Regards

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