Is it normal for my scar to suddenly start to get hard after 3 1/2 months of tummy tuck revision?

Scars that exhibit inflammation, hypertrophy, or keloid reaction can be managed with our HIDEF protocols. Surgery is not often necessary as we have a full laser and RF protocol. 
Treatments begin with examination of the scars followed by pretreatment with Melarase creams for pigmentation, Plato's Scar Serum for hypertrophy, followed by laser and RF protocols with PDL, RF, and microfractional RF or laser. Kenalog IIT is also very important. 
Best, 
Dr. Karamanoukian
Realself100 Surgeon

There are two types of scar hardness that can occur. A raised prominent scar which is visibly noticeable is usually what's called scar hypertrophy and can often be treated with injections of cortisone into the scar. Hardness of the scar under the scar which is not seen but can be felt is what we refer to as a "healing ridge" and will usually resolve by itself.If it doesn't resolve several months after appearing, it too can be softened by injections of cortisone.