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What causes bump on back of upper leg?

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Posted on Mon, 14 Jul 2014
Question: I have a bump on back do my upper leg. At first I thought was a pimple without a head. I popped it and puss came out. It was thick and smelled bad. The spot went down. The spot came back later and it is now a small bump. I popped it again and more thick puss that smelled. Puss is basically white with a yellowish tint.
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Answered by Dr. Kakkar S. (9 minutes later)
Brief Answer:
Furuncle

Detailed Answer:
Hello and welcome to healthcaremagic

I would keep a possibility of a furuncle. Furuncle is bacterial infection of the skin. The infection gaining entry through the hair follicle.

The best way to approach is to start on an empirical oral antibiotic for a week OR 10 days.

My choice of oral antibiotic would have been Amoxycillin 500mg+Clavulanic acid 125 mg, thrice daily, for a week

OR

Cephalexin 500 mg thrice daily for a week

OR

Cefadroxil 500mg twice daily, for a week. This would take care of the infection.

An OTC antibacterial cream/ointment e.g 2% Mupirocin ointment OR Neosporin ointment can be applied twice daily.

take care
regards
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Follow up: Dr. Kakkar S. (8 minutes later)
This spot has been there for several months would that still apply? Once I pop it the spot goes away then will be back a month or two later.
doctor
Answered by Dr. Kakkar S. (5 hours later)
Brief Answer:
Sebaceous cyst

Detailed Answer:
Hi

Thanks for the additional information.

It is most likely a sebaceous cyst. The cyst unless completely removed along with the cyst wall will keep recurring again and again.

The pus like thick cheesy contents that empty now and then are actually secretions that get accumulated from the glands lining the wall of the cyst.

It might get secondarily infected and may become swollen and painful, that is when you need these antibiotics. However, the curative treatment would be to get it removed surgically along with the cyst wall. I would suggest that you seek an appointment either with a surgeon or with a dermatologist, regarding cyst removal surgery.

Regards
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Kakkar S.

Dermatologist

Practicing since :2002

Answered : 9450 Questions

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What causes bump on back of upper leg?

Brief Answer: Furuncle Detailed Answer: Hello and welcome to healthcaremagic I would keep a possibility of a furuncle. Furuncle is bacterial infection of the skin. The infection gaining entry through the hair follicle. The best way to approach is to start on an empirical oral antibiotic for a week OR 10 days. My choice of oral antibiotic would have been Amoxycillin 500mg+Clavulanic acid 125 mg, thrice daily, for a week OR Cephalexin 500 mg thrice daily for a week OR Cefadroxil 500mg twice daily, for a week. This would take care of the infection. An OTC antibacterial cream/ointment e.g 2% Mupirocin ointment OR Neosporin ointment can be applied twice daily. take care regards