No, according to the information of Popular Health Network, carbomer is a rheological regulator and has no effect on the treatment of verruca plana. Tretinoin cream and imiquimod cream can be used to treat verruca plana. Verruca plana is a kind of wart caused by human papillomavirus (HPV) infecting the skin, which mostly occurs on the face, the back of the hand and the forearm. It often manifests as a large number of small flat-topped papules, with no conscious symptoms and occasional itching.