Is regular follow-up required for skin redness?

So, simple cellulitis or skin infection can be monitored by yourself and if the antibiotics seem to be doing the job and improving the redness, that should be good enough. If you do have an ulcer or a breakdown in your skin integrity, it is probably worthwhile to monitor this yourself in the first instance if it improves well and good. If it doesn't and there's deep ulceration with exposure of underlying structures that might require a specialist to review your wound on a regular basis, particularly with the application of good dressings and good wound care to improve the overall situation.