Can die-off effect occur several weeks into the diet and how long?

[Guest guest]

My son, age 8,diagnosed with Crohn's in July having had symptoms for 9 months

started SCD about 5 weeks ago. After 4 days, I saw big improvements. The

dizziness/headachy feeling was gone. The low grade fever was gone, the joint

pain was improving, the cramping was fewer and less intense. Rarely had

diarrhea, thankfully. So, 3 1/2 weeks into the diet, he goes into a severe joint

pain flare up, with fever and fatigue. It started after beginning physical

therapy so I thought it was a result of the PT. But now the cramping seems a

little worse and he is getting the dizziness, fatigue, moodiness & irritable,

still having pretty bad joint pain, although a little better than a week ago. He

had some loose stools, I think a result of some grapes which we " tried "

obviously too early. I haven't introduced many new foods. He was doing well

early on, and I was so hopeful. Does anyone know if this is a " flare " or if it

is possibly die-off. How long could the die-off last. Yesterday, we saw an

integrative pediatric GI who thankfully was very supportive of the diet and

thinks it may be die-off, but he is not completely knowledgeable about SCD and

didn't see what was wrong with probiotic with bifidus. He recommended some

homeopathic remedies from Boiron, fish oil (which I am not sure if it is legal

brand), and probiotics (which has the bifidus), to get started. Just wondering

what the die-off entails. I thought die-off occurred only the first few days.

Could it be occurring after 4-5 weeks? -Yvette, Luke's mom.