You should find a place to pray that is secluded, and mustn’t pray in public unless as a necessity. In this case, you can keep your face covered and you can pray on any ground whether clean or dirty as long as there is no najasah or impurity that prevents prayer.

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If a person can’t make full ghusul due to an affected area, he must wipe over it if it is a bandage. If this is also not possible, he must perform total ghusul with the exception of that affected are and offer tayammum to compensate not washing that affected area.

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