Hi welcome to HCm I have gone thru your query .I can understand your concern regarding swelling and tightness while bending of fractured thumb . Dear, swelling and pain are very natural symptoms to face after being hurt severely and fracture . In fact , inflammation is your body s way of bringing blood and nutrients to the area that needs healing . But that happened ,as you said , a few weeks ago . The swelling and tightness is still there it shows that some thing is amiss in your treatment and needs medical attention . It s important not to disturb the splint if applied , as this is holding your fractured finger in position Physical or occupational therapy treatments are helpful for easing the stiffness and helping you regain thumb movement . I suggest you to see a specialist for proper guidance . Meanwhile , take care of your diet . Include anti-inflammatory fruits and plants as pineapples, capers, apples, and red onions, ginger garlic and Turmeric , Aloe Vera , olive oil , Lemon and Banana also Healthy immune systems also that are considered to help early recovery . Hope this helps solves your query .Take care , All the best .Wish Get well soon . Don t hesitate to get back tf have any further query .