Plantar warts sometimes become confluent. The warty tissue is rough and thick. The excessive hyperkeratosis should be pared for topical treatment to be effective.

Mosaic plantar warts meld together, in this case in apposing skin. The warty tissue has spread the virus from the plantar foot to the apposing fifth toe.

Rough, flesh-colored, hyperkeratotic papules with punctuate hemorrhages along the lateral toe. The apposing toe is also affected. Most warts resolve with time and development of cellular immunity.