Spicy Hot Chilli peppers can at times be a masochists delight, we are all well aware that they are capable of clearing your sinuses and reddening the whites of your eye balls.
Regardless of how you spell it Chili, Chilli or chile aside from heat factor they have a number of noteworthy health benefits. Yup, what doesn't kill you makes you stronger. Chilli peppers contain capsaicin, along with similar compounds in hot peppers known as capsaicinoids, it's what gives them their pungent bravado. It is also responsible for many of the beneficial attributes of chilli peppers.
Topical capsaicin is now a recognized treatment option for osteoarthritis and rheumatoid arthritis pain.
'In a double-blind, randomized study, 70 patients with OA [osteoarthritis] and 31 patients with rheumatoid arthritis applied either capsaicin 0.025% cream or placebo to painful knees for 4 weeks. .... After 4 weeks of capsaicin treatment, rheumatoid arthritis pain was reduced by 57% and OA pain was reduced by 33%' 
Cultures where chilli peppers are used more commonly tend to have a much lower instance of heart attack and certain types of cardiovascular disease. Studies have demonstrated that they reduce blood cholesterol as well as triglyceride levels.
Triglycerides are a form of fat in our blood that our bodies use for energy. Elevated triglyceride levels, beyond what our bodies need, can raise your risk of heart disease. The compounds in chilli peppers also help our bodies dissolve fibrin, a protein our body uses to form blood clots.
As previously stated we all well aware that Chilli Peppers are capable of clearing your sinuses. Capsaicin in Chilli Peppers stimulates bronchial secretions that help clear excess mucus from our respiratory systems.
Bright red and orange hued chilli peppers are high in beta carotene, vitamin c and vitamin A all of which serve in one way or another to boost our immune systems.
The jury is out on whether or not chilli peppers actually help in weight loss. Theoretically, the heat produced within your body when you consume red hot chilli peppers increases oxyegen consumption and thermogenesis for a short while. This thermogenesis [heat production] consumes a fair amount of calories.