Bit of an embarrassing one... photo attached

[Cherryblossom99]

A few days ago I noticed a stinging type pain around my tailbone and it is quite tender, feels bruised almost.
But when I managed to look at the area in the mirror I seen this big red mark, it almost looks like a healing wound or stretch mark type thing but I haven't gained weight or anything recently.
The mark seems to extend up from the top of my rectal sort of area.
I've attached photos, cropped so they aren't too graphic!! 🙈 what do you think it is?

Could be from sweating a lot. Maybe try keeping it dry and apply a nappy cream. If it doesn't clear up it might need an antifungal cream

Looks like a sweat line. Have you been wearing nylon pants instead of cotton?
A bit of sudocreme will soon sort it

Sudocreme that overnight. Maybe a few nights. Should be better

https://www.mumsnet.com/talk/general_health/4760381-split-skin-inside-my-bum-crack

There was a thread about something similar a few weeks ago.

You may have cracked the skin, look up jock itch. If it is, you'll want an antifungal.

Agree - dry the area and apply sudocream

Thanks all, I had a look at that other thread and it definitely looks very similar. I will keep it dry and try come nappy cream or something

Cotton pants, anti fungal cream and keep your fingers crossed it's not a pilonidal sinus which can feel like a bruised tailbone when they start.

Dry your crack with the hairdryer and do not rub it with a towel or avoid drying it.

And go naked to bed so it gets to air a lot

Don't stretch the skin.
Google pilonidal sinus to see why not

I've had that before, it's a sweat rash. Anti fungal cream will sort it out. You'll probably need a prescription from the gp.

Oh god, I googled pilondial sinus and I wish I didn't lol. Fingers crossed 🤞 it's just a sweat rash and I will use the cream and keep an eye on it

Inverse psoriasis?

I have psoriasis and often get flares that look similar yet a bit redder then your pic, it could be early though.