I Have Just Had A Thr Revision, They Put A

I have just had a thr revision, they put a new socket in as it moved. The THR was done 6 months ago. I am on day 5 & yesterday a small blochy red patch appeared, by afternoon it was a larger redder area. It is on the same leg as thr but on the inner side, no direct redness from the wound. Then it faded a little today although it has spread to a larger area. Now it is redder again & definitely spread. I have been told this is not the normal pattern of cellulitus, to fade & then get redder again. I have had cellulitus 3 times now. The first was after a flu jab & was very typical cellulitus which had to be be treated by iv antibiotics. The other two times were both on my hip replacements (left & right) & weren't typical. But again responded well to iv antibiotics. I'm immune suppressed & only 39yrs old. Please can you tell me can this be a pattern of cellulitus to fade slightly and get dark again, all the time spreading!