DS (4) had 2 swollen, “puffy” feeling, red toes on Weds morning, but no pain or itching. No obvious cause. Went to nursery and was well in himself- though did need his inhaler when he was out playing.
Thursday they were rather worse and they looked bruised, so fearing a hairline fracture of his foot kept him at home, spoke to GP and sent pics, who suggested chillblains (he’d had an incident with a woodland bog at the weekend) or an infection, and started some antibiotics.
Friday worse again- now purplish looking bruises were pronounced. Spoke to doc again who asked for a urine sample (he’s had some diabetes like symptoms unrelated to this) which was clear. Told to keep on with ABs.
Today- swelling has gone down, toes still look bruised, but on his OTHER foot, he’s developed a couple of small weird blisters, some reddish patches. and the pad of one toe is sloughing off 
.
I’m wondering whether it’s HFM - but have also had him tested for Covid this afternoon just in case.
He’s not in pain, and he’s well in himself- splash emotional and his asthma seems to be triggered easily by the heating, but that’s normal for the time of year....
Any ideas? Have attached some pics.... one of the toes that started the whole shenanigans, one of the sloughed off toe pad, and one of one of the weird blistery thing.
Have to add, am fanatical about foot health and care- we like long walks and don’t own a car, plus... just nothing more miserable than a blister- so shoes, wellies etc all fit well, no rubbing etc etc