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What is this spot on arm. TICK, LYME DISEASE?

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My 5 year old son has this spot on his arm that looks like a bulls eye from a tick or lyme disease. I haven't seen a tick on him but I am worried.

Category: Pediatrician

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Category: ICU/ Critical Care Specialist
 32 Doctors Online

Dear parent,
Thanks for your query at
I can understand your concerns.
This definitely looks worrying.
Kindly provide more details..
Your exact location, type of residence, climate zone, types of vegetation around home, etc.
Also provide details regarding child's condition such as fever or myalgia or any other symptom that he complains of. Any other site of involvement?
Dr. Saptharishi L G

Patient replied :

Thabk you for your reply but the spot went away and is now just a small red circle so I am assuming it was a mosquito bite. But just in case I will answer your questions. We live in NY state and we have seen a tick a couple years old patientago outside so they are bad here in NY state, but I never seen one on my son. Here is what it looks like now. Also, when he woke up at 5 this morning, there was a new mosquito bite next to it, and now that one disappeared in a matter of just 3 hours - can mosquito bites just go away that fast and shrink that fast? Here is what the one I sent you looks like now, only 4 hours later.

Dear parent,
Thank you for replying to my questions. I am pleasantly surprised that it faded away so soon. Theoretically, mosquito bites can also lead to such a skin rash, but it is a rare occurrence.
Lyme's disease, rickettsial illnesses and drug rashes usually have such a 'target' or 'bull's eye' appearance. But, none of these would resolve so rapidly. Hence, there is no need for any concern.
It is important to protect your child from mosquito bites as well ;)
Take care

Dr. Saptharishi L G
Category: ICU/ Critical Care Specialist
Senior Residency: DM,  Pediatric Critical Care, PGIMER

Residency: MD, Pediatrics, Postgraduate Medical Education & Research (PGIMER), Chandigarh, 2013

Internship: JIPMER, 2009

Medical School: MBBS, Jawaharlal Institute of Post-graduate Medical Education & Research (JIPMER), Puducherry, 2008
Dr. Saptharishi L G and 4 other Medical Specialists are ready to help you

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