Hello,
Brown spots around the knee joint may be because of conditions like sun exposure,
hormonal changes, medications side effects, inflammation, spots can develop after an episode of
eczema, acne, after an insect bite,
diabetes mellitus and few cosmetic products like lotions may irritate the skin and cause brown spots.
Treatment depends upon the cause. The following are few treatment options:
1) Skin lightening creams like
hydroquinone 3%
2)
Laser treatment
3) Microdermabrasion
4) Cryotherapy
As they are not causing any kind of trouble, you can leave them as they are. Moreover, they are not on face or hands so it is not a cosmetic problem.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Pallavi M., Anesthesiologist