<s>[INST] Hi Doc,My son of age 2.5 years infected with Giardia lambila and treated with nizonide for 3 days. But still he complains that he gets pain at naval point. why it is happenng after treatment also?Shall I have to give him more medication or it is due to reapir of intestine?Please explain.. [/INST] Hi, The area has to heal up treating any infection. Cannot say in your particular case, but generally, it takes days to a week for the symptoms to subside. There are many other possibilities but this one is pretty much certain to be there (giardia and its consequences.) Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Matt Wachsman, Addiction Medicine Specialist </s>