Fingerless gloves? If you are at your desk a heated throw you could have on your lap and stick your hands in when you can? A small desktop heater/fan? There are also chemical heat packs for hands you might investigate. (Sadly my office doesn't permit small heaters.) I have Raynaud's and I take a med that increases blood flow not sure if that would be contraindicated for you. Good luck!

i have heated gloves. work very well but are bulky. i should read the whole bloody thing before i reply. so sorry. i have used heated grips on my bike. this implies you could maybe lay them on/in a heating pad when not actively moving. might help a little. my wife's solution usually caused me to fall out of bed. lol.

I use these glove things with no fingers, but they have like a flip up mitten on the end. You find them a outdoor stores. You can use your finger tips when you need to, and flip down the mittens when your fingers get cold.

This may be helpful. It’s rechargeable and can be used as a power bank. They get reallly warm. You can put them on your desk and take warning breaks

Hand Warmers Rechargeable, 4000×2mAh Electric Portable Pocket Hand Warmer/Power Bank, Great for Outdoor Sports, Hunting, Golf, Camping, Warm Gifts for Women, Men https://www.amazon.com/dp/B08JZ34SXP/ref=cm_sw_r_cp_api_glt_fabc_ZXEJCXCZQPYGV5XWVJMN

Warming your hands directly is largely a futile endeavor. Likewise with wearing gloves. If your hands are cold because your body is not flooding them with blood to keep them warm, the gloves don't have anything to work with.

I have Reynaud's syndrome and one thing that works for me is to make sure my body and legs are warm...perhaps even a bit over-warm. Once my body decides to start radiating heat instead of holding on to it, my hands warm right up.

So I wear long underwear, a sweater, sometimes even a hat. It's not because I'm cold, but I have to get my body to decide to dump the heat.

Some vitamins or supplements also seem to help me. Niacin can cause flushing, which can be unpleasant, but well...your hands are warm. And I take a multivitamin with taurine in it.

Consider keeping a thermos of hot water on your desk. It will stay warm for hours and you can wrap your cold hands around it for a few moments to warm them up.

There is something called “hot paws“ they’re little square packets that you heat up and usually keep in your pocket, gloves, or even just hold them. We use them while going on skidoo or side-by-side trail rides and they work really well!

I keep a thermos full of hot tea and a mug to warm my hands on. Also you can buy portable chargers that function as hand warmers as well as charge your phone. I keep one in each pocket if I'm going somewhere very cold.

Fingerless gloves, or wrist warmers are great. A hot water bottle, so you can hug something warm. A space heater under the desk. Layers/warm clothes. I don’t know how that works, but it seems to help keep my hands warm to wear a vest or sweater, even if the rest of my body feels warm.

I tried a heated mouse pad from Amazon once, but it was only marginally warm. Plus I had to get used to the mouse pad feeling bumpy, not flat, due to the wires in it that provided the heat. There may be better options available now, as this was a few years ago.

Have you tried washing them in really cold water? I know in survival, if you have cold feet, you go wash them in a cold lake, it stimulates blood circulation.
Failing that, you get warming packs for fishermen. It is like a tin box with charcoal inside. You light it and allow it to glow, the embers heat the box and you can stick your hand in your pocket to warm it up 😊

Would a heated blanket at your desk work? That way you’ve got another source of heat.

Never use gloves. Use mittens. The last thing you want is to cut off or restrict the blood supply to your fingers.