What Causes White Bumps On Knee?

Posted on Thu, 12 Mar 2015

Medically reviewed by Ask A Doctor - 24x7 Medical Review Team

Thu, 12 Mar 2015 Answered on

Wed, 1 Apr 2015 Last reviewed on

Question : My teenage son has a group of small white bumps on his knee. At first I thought it was a blister from a fall (he skateboards a lot) but once I looked closer it's a group of small bumps that look like indiviual white heads/pimples but grouped together to form on large blister. What could this be?

Answered by Dr. Dr. Naveen Kumar Sharma (2 hours later)

Brief Answer:
please send me image of blister

Detailed Answer:
Hello,
I have studied your case. I think it can be due to contact dermatitis. It is common in person who sits over knee for long time like Priest, sportsman. So before I advised you any thing I would like to know little detail about his illness.
1. Since when he is having this problem?
2. is he having any pain or itching in the blister area?
3. Please send me images of the knee?
I am waiting for your answers . I will try my best to help you,
Thanks

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar

Follow up: Dr. Dr. Naveen Kumar Sharma (10 hours later)

He has had it for 2 weeks. He has no pain or itching. I uploaded 2 photos to this conversation.
Thank you for helping

Answered by Dr. Dr. Naveen Kumar Sharma (2 hours later)

Brief Answer:
it can be a insect bite

Detailed Answer:
Hello,
I think it can be an insect bite. Other possiblity is a contact dermtitis. I would suggest you to meet a dermatologist and discuss about this lesion if it increases in size. It might need ointment like Betamethasone.
He should avooid wearing very tight garments, moisture or applying any cream over it.
I hope this answer will be useful for you.Let me know if there is any other follow up questions.
thanks

Above answer was peer-reviewed by : Dr. Vinay Bhardwaj