###Human: There is white tongue with swollen lymphnodes. Why? ###Assistant: Hi. White patches on the tongue can be oral thrush caused by candida albicans seen in severe imunosupression especially stage 3 or 4. Pain on swallowing can be from involvement of the larynx and oesophagus of the thrush seen in stage four. Persistent lymph node is also common. The kid should be put on PeP very important just to avoid getting infected, because there could be an open wound in the child's mouth through which the virus can gain entry.